Insecticidal compounds and compositions

ABSTRACT

The invention provides insecticidally active compounds of formula: ##STR1## wherein X is N or CH; R a  is the group (R 1 )(R 2 )NS(O) n  --wherein R 1  and R 2  are independently selected from H, alkyl, haloalkyl, alkoxy, alkoxyalkyl, formyl, alkanoyl, alkenyl, alkynyl, optionally substituted cycloalkyl, optionally substituted cycloalkylmethyl, optionally substituted benzyl and optionally substituted phenyl, and n is 0, 1 or 2; R b  is the group --OSO 2  R 3  wherein R 3  is alkyl optionally substituted by an optionally substituted phenyl group, haloalkyl, alkenyl optionally substituted by an optionally substituted phenyl group, optionally substituted aryl or N(R 4 )(R 5 ), wherein R 4  and R 5  are independently selected from H and alkyl; and wherein the groups R a  and R b  occupy either a 1,3 configuration relative to each other when X is CH, or a 2,4 or 2,6 configuration relative to X when X is N. The invention provides insecticidal compositions comprising these compounds and methods of their use in controlling insects and also provides processes and intermediates for preparing the compounds.

This invention relates to novel insecticidally active compounds, to compositions comprising them and methods of their use in combating insect pests, and to novel intermediates and chemical processes useful in their preparation.

Insecticidal activity has been reported for alkylthiophenyl sulphonates and oxidised derivatives in Japanese Patent Publication J68/003898 and in Japanese Patent Application No J48/098025, and also by Kato et al in Journal of Pesticide Science, Volume 13, pages 107-115 (1988). Insecticidal and nematocidal activity has also been described for alkylthiopyrid-2-yl sulphonates and oxidised derivatives in European Patent Application No 0182603. The present invention is based on the discovery of high levels of insecticidal activity for novel pyridyl and phenyl sulphonates having a sulphonamide substituent, or a reduced form thereof, on the pyridine or benzene ring such that the two substituents are arranged in a 1,3configuration relative to each other. The compounds of the invention exhibit particularly high levels of control of target insect pests and are characterised by an excellent level of systemic activity.

In a first aspect the invention provides a compound of formula (I): ##STR2## wherein X is nitrogen or carbon bearing a hydrogen atom; R^(a) is a group of formula (R¹)(R²)NS(O)_(n) -- wherein R¹ and R² are independently selected from hydrogen, C₁₋₈ alkyl, C₁₋₆ haloalkyl, C₁₋₆ alkoxy, C₂₋₆ alkoxyalkyl, formyl, C₂₋₆ alkanoyl, C₂₋₈ alkenyl, C₂₋₈ alkynyl, optionally substituted C₃₋₆ cycloalkyl, optionally substituted C₃₋₆ cycloalkylmethyl, optionally substituted phenyl and optionally substituted benzyl, and n is 0, 1 or 2; R^(b) is a group of formula --OSO₂ R³ wherein R³ is selected from C₁₋₈ alkyl, C₁₋₄ alkyl substituted by an optionally substituted phenyl group, C₁₋₈ haloalkyl, C₂₋₆ alkenyl, C₂₋₄ alkenyl substituted by an optionally substituted phenyl group, optionally substituted aryl, and a group of formula --N(R⁴)(R⁵) wherein R⁴ and R⁵ are independently selected from hydrogen and C₁₋₄ alkyl; and wherein the groups R^(a) and R^(b) occupy either a 1,3 configuration relative to each other on the ring when X is carbon bearing a hydrogen, or a 2,4 or 2,6 configuration relative to the group X when X is nitrogen.

The terms alkyl, haloalkyl, alkoxy, alkoxyalkyl, alkanoyl, alkenyl and alkynyl as used herein include within their scope both straight and branched chain varieties.

Suitable examples of the groups R¹ and R² are hydrogen, C₁₋₇ alkyl, for example methyl, ethyl, n-propyl, 1-methylethyl, n-butyl, 1-methylpropyl, 2-methylpropyl, 1,1-dimethylethyl, n-pentyl, 2,2-dimethylpropyl, pent-2-yl, n-hexyl, hex-2-yl, n-heptyl or hept-2-yl; C₁₋₄ haloalkyl, for example fluoromethyl, difluoromethyl, trifluoromethyl, 2,2,2-trifluoroethyl, pentafluoroethyl, 3,3,3-trifluoropropyl, 1-trifluoromethylethyl or 2,2,3,3,3-pentafluoropropyl; C₁₋₄ alkoxy, for example methoxy, ethoxy, propoxy or 1-methylethoxy; C₂₋₄ alkoxyalkyl, for example methoxymethyl or methoxyethyl; formyl; C₂₋₄ alkanoyl, for example acetyl or propanoyl; C₂₋₄ alkenyl, for example prop-2-en-1-yl; C₂₋₄ alkynyl, for example prop-2-yn-1-yl; optionally substituted C₃₋₆ cycloalkyl, for example cyclopropyl; optionally substituted C₃₋₆ cycloalkylmethyl, for example cyclopropylmethyl; optionally substituted phenyl or optionally substituted benzyl.

Suitable examples of the group R³ are C₁₋₄ alkyl, for example methyl, ethyl, n-propyl, 1-methylethyl, n-butyl, 2-methylpropyl or 1,1-dimethylethyl; C₁₋₂ alkyl substituted with an optionally substituted phenyl group, for example phenylmethyl or 2-phenylethyl; C₁₋₆ haloalkyl, for example fluoromethyl, difluoromethyl, trifluoromethyl, chloromethyl, dichloromethyl, trichloromethyl, 2,2,2-trifluoroethyl, 1,1,2,2,2-pentaflouoroethyl, 2,2,2-trichloromethyl, 3-chloropropyl, 3-fluoropropyl, or perfluoro-n-hexyl; C₂₋₄ alkenyl, for example ethenyl or prop-2-en-1-yl; ethenyl optionally substituted with an optionally substituted phenyl group, for example 2-phenylethenyl; optionally substituted phenyl, for example phenyl or a 4-substituted phenyl group such as 4-methylphenyl, 4-trifluoromethylphenyl or 4-methoxyphenyl; optionally substituted pyridyl, for example pyrid-2-yl or 6-fluoro-2-pyridyl; 2-thienyl; 3-thienyl; or a group of formula --N(R⁴)(R⁵) wherein R⁴ and R⁵ are independently selected from hydrogen and C₁₋₄ alkyl, for example methylamino, ethylamino, dimethylamino or diethylamino.

A preferred group of compounds according to the invention comprises any of those compounds of formula (I) described hereinabove wherein the value of n is 2.

A further preferred group of compounds according to the invention comprises any of those compounds of formula (I) described hereinabove wherein the group X is nitrogen.

A further preferred group of compounds according to the invention are those of formula (IA): ##STR3## wherein R¹ and R² are independently selected from hydrogen, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₁₋₆ alkoxy, C₁₋₆ alkoxyalkyl, formyl, C₂₋₆ alkanoyl, C₃₋₆ cycloalkyl, optionally substituted phenyl and optionally substituted benzyl; R³ is selected from C₁₋₆ alkyl, C₁₋₆ haloalkyl and a group of formula --N(R⁴)(R⁵) where R⁴ and R⁵ are independently selected from hydrogen and C₁₋₆ alkyl; and n is selected from 0, 1 and 2.

A particularly preferred group of compounds according to the invention are those according to formula (IA) wherein the value of n is 2; one of R¹ and R² is C₁₋₄ alkyl, C₁₋₃ haloalkyl, C₂₋₃ alkynyl, cyclopropyl or cyclopropylmethyl, and the other is either hydrogen, C₁₋₄ alkyl, C₁₋₃ haloalkyl, C₂₋₃ alkynyl, cyclopropyl or cyclopropylmethyl; and R³ is methyl.

Compounds according to this invention which are to be considered as being specifically disclosed herein are presented in Tables IA, IB and IC.

                                      TABLE IA                                     __________________________________________________________________________      ##STR4##                                                                      COMPOUND NO.                                                                             R.sup.1      R.sup.2  n R.sup.3                                      __________________________________________________________________________     1         CH(CH.sub.3).sub.2                                                                          H        2 CH.sub.3                                     2         CH(CH.sub.3).sub.2                                                                          CH.sub.3 2 CH.sub.3                                     3         cyclopropyl  H        2 CH.sub.3                                     4         CH(CH.sub.3).sub.2                                                                          CH.sub.3 2                                                                                 ##STR5##                                    5         CH.sub.2 CF.sub.3                                                                           H        2 CH.sub.3                                     6         COCH.sub.3   H        2 CH.sub.3                                     7         CH(CH.sub.3)(CH.sub.2).sub.4 CH.sub.3                                                       H        2 CH.sub.3                                     8         OCH.sub.3    CH.sub.3 2 CH.sub.3                                     9         CH.sub.2 CH.sub.2 OCH.sub.3                                                                 H        2 CH.sub.3                                     10        phenyl       H        2 CH.sub.3                                     11        CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               H        2 CH.sub.3                                     12        CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               H        2 C.sub.2 H.sub.5                              13        CH(CH.sub.3).sub.2                                                                          H        2 CF.sub.3                                     14        CH(CH.sub.3).sub.2                                                                          H        2 C.sub.2 H.sub.5                              15        CH(CH.sub.3).sub.2                                                                          CH.sub.3 2 C.sub.2 H.sub.5                              16        CH(CH.sub.3).sub.2                                                                          CH.sub.3 2 CF.sub.3                                     17        CH(CH.sub.3).sub.2                                                                          H        2 CH.sub.2 CF.sub.3                            18        CH(CH.sub.3).sub.2                                                                          H        2 phenyl                                       19        CH(CH.sub.3).sub.2                                                                          H        2                                                                                 ##STR6##                                    20        CH(CH.sub.3).sub.2                                                                          H        2 CH.sub.2 CH.sub.2 CH.sub.3                   21        CH(CH.sub.3).sub.2                                                                          H        2 (CF.sub.2).sub.5 CF.sub.3                    22        CH(CH.sub.3).sub.2                                                                          H        2 (CH.sub.2).sub.3 CH.sub.3                    23        CH(CH.sub.3).sub.2                                                                          H        2                                                                                 ##STR7##                                    24        CH(CH.sub.3).sub.2                                                                          H        2                                                                                 ##STR8##                                    25        CH(CH.sub.3).sub.2                                                                          H        2                                                                                 ##STR9##                                    26        CH(CH.sub.3).sub.2                                                                          H        2 CH.sub.2 Cl                                  27        CH(CH.sub.3).sub.2                                                                          H        2 CH.sub.2 CH.sub.2 CH.sub.2 Cl                28        CH(CH.sub.3).sub.2                                                                          H        2                                                                                 ##STR10##                                   29        CH(CH.sub.3).sub.2                                                                          H        2                                                                                 ##STR11##                                   30        CH(CH.sub.3).sub.2                                                                          H        2 CHCl.sub.2                                   31                                                                                        ##STR12##   H        2 C.sub.2 H.sub.5                              32        H            H        2 CH.sub.3                                     33        CH(CH.sub.3).sub.2                                                                          H        2 CHCH.sub.2                                   34        CH(CH.sub.3).sub.2                                                                          CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                     35                                                                                        ##STR13##   CH.sub.3 2 CH.sub.3                                     36        (CH.sub.2).sub.2 CH.sub.3                                                                   (CH.sub.2).sub.2 CH.sub.3                                                               2 CH.sub.3                                     37        C.sub.2 H.sub.5                                                                             C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     38        (CH.sub.2).sub.2 CH.sub.3                                                                   CH.sub.3 2 CH.sub.3                                     39        CH.sub. 3    CH.sub.3 2 CH.sub.3                                     40        CH.sub.2 CH(CH.sub.3).sub.2                                                                 H        2 CH.sub.3                                     41        C.sub.2 H.sub.5                                                                             CH.sub.3 2 CH.sub.3                                     42        CH.sub.2 CF.sub.2 CF.sub.3                                                                  H        2 CH.sub.3                                     43        CH.sub.2 CH.sub.2 CH.sub.2 Cl                                                               CH.sub.3 2 CH.sub.3                                     44        CH(CH.sub.3)CF.sub.3                                                                        H        2 CH.sub.3                                     45        (CH.sub.2).sub.2 CF.sub. 3                                                                  H        2 CH.sub.3                                     46        CH.sub.3     H        2 CH.sub.3                                     47        CH.sub.2 CCH CH.sub.3 2 CH.sub.3                                     48        C(CH.sub.3).sub.3                                                                           H        2 CH.sub.3                                     51        CH(CH.sub.3).sub.2                                                                          H        0 CH.sub.3                                     52        CH(CH.sub.3).sub.2                                                                          H        1 CH.sub.3                                     53        C.sub.2 H.sub.5                                                                             H        2 CH.sub.3                                     54        CH.sub.2 CH.sub.2 CH.sub.3                                                                  H        2 CH.sub.3                                     55        (CH.sub.2).sub.3 CH.sub.3                                                                   H        2 CH.sub.3                                     56                                                                                        ##STR14##   H        2 CH.sub.3                                     57        CH.sub.2 CCH H        2 CH.sub.3                                     58        CH.sub.2 CF.sub.3                                                                           CH.sub.3 2 CH.sub.3                                     59        CH.sub.2 CF.sub.2 CF.sub.3                                                                  CH.sub.3 2 CH.sub.3                                     60        CH.sub.2 CH.sub.2 CF.sub.3                                                                  CH.sub.3 2 CH.sub.3                                     61        CH(CF.sub.3)CH.sub.3                                                                        CH.sub.3 2 CH.sub.3                                     62                                                                                        ##STR15##   CH.sub.3 2 CH.sub.3                                     63        (CH.sub.2).sub.3 CH.sub.3                                                                   CH.sub.3 2 CH.sub. 3                                    64        CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               CH.sub.3 2 CH.sub.3                                     65        CH.sub.2 CH(CH.sub.3).sub.2                                                                 CH.sub.3 2 CH.sub.3                                     66        C(CH.sub.3).sub.3                                                                           CH.sub.3 2 CH.sub.3                                     67        CH.sub.2 CF.sub.3                                                                           C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     68        CH.sub.2 CF.sub.2 CF.sub.3                                                                  C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     69        CH.sub.2 CH.sub.2 CH.sub.3                                                                  C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     70        CH.sub.2 CH.sub.2 CF.sub.3                                                                  C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     71        CH(CH.sub.3).sub.2                                                                          C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     72        CH(CF.sub.3)CH.sub.3                                                                        C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     73                                                                                        ##STR16##   C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     74        (CH.sub.2).sub.3 CH.sub.3                                                                   C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     75        CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     76        CH.sub.2 CH(CH.sub.3).sub.2                                                                 C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     77        C(CH.sub.3).sub.3                                                                           C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     78                                                                                        ##STR17##   C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     79        CH.sub.2 CCH C.sub.2 H.sub.5                                                                         2 CH.sub.3                                     80        CH.sub.2 CF.sub.2 CF.sub.3                                                                  CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     81        CH.sub.2 CH.sub.2 CH.sub.3                                                                  CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     82        CH.sub.2 CH.sub.2 CF.sub.3                                                                  CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     83        CH(CH.sub.3).sub.2                                                                          CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     84        CH(CF.sub.3)CH.sub.3                                                                        CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     85                                                                                        ##STR18##   CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     86        (CH.sub.3).sub.3 CH.sub.3                                                                   CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     87        CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     88        CH.sub.2 CH(CH.sub.3).sub.2                                                                 CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     89        C(CH.sub.3).sub.3                                                                           CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     90                                                                                        ##STR19##   CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     91        CH.sub.2 C CH                                                                               CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                     92        CH.sub.2 CH.sub.2 CF.sub.3                                                                  CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                     93        CH(CH.sub.3).sub.2                                                                          CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                     94        CH(CF.sub.3)CH.sub.3                                                                        CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                     95                                                                                        ##STR20##   CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                     96        (CH.sub.2).sub.3 CH.sub.3                                                                   CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                     97        CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                     98        CH.sub.2 CH(CH.sub.3).sub.2                                                                 CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                     99        C(CH.sub.3).sub.3                                                                           CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                     100                                                                                       ##STR21##   CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                     101       CH.sub.2 CCH CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                     102       CH.sub.2 CF.sub.2 CF.sub.3                                                                  CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                     103       CH.sub.2 CF.sub.2 CF.sub.3                                                                  CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                     104       CH.sub.2 CH.sub.2 CF.sub.3                                                                  CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                     105       CH(CH.sub.3).sub.2                                                                          CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                     106       CH(CF.sub.3)CH.sub.3                                                                        CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                     107                                                                                       ##STR22##   CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                     108       (CH.sub.2).sub.3 CH.sub.3                                                                   CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                     109       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                     110       CH.sub.2 CH(CH.sub.3).sub.2                                                                 CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                     111       C(CH.sub.3).sub.3                                                                           CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                     112                                                                                       ##STR23##   CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                     113       CH.sub.2 C CH                                                                               CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                     114       CH.sub.2 CF.sub.2 CF.sub.3                                                                  CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                     115       CH(CF.sub.3)CH.sub.3                                                                        CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                     116                                                                                       ##STR24##   CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                     117       (CH.sub.2).sub.3 CH.sub.3                                                                   CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                     118       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                     119       CH.sub.2 CH(CH.sub.3).sub.2                                                                 CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                     120       C(CH.sub.3).sub.3                                                                           CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                     121                                                                                       ##STR25##   CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                     122       CH.sub.2 CCH CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                     123       CH.sub.2 CF.sub.2 CF.sub.3                                                                  CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                     124       CH(CF.sub.3)CH.sub.3                                                                        CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                     125                                                                                       ##STR26##   CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                     126       (CH.sub.2).sub.3 CH.sub.3                                                                   CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                     127       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                     128       CH.sub.2 CH(CH.sub.3).sub.2                                                                 CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                     129       C(CH.sub.3).sub.3                                                                           CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                     130                                                                                       ##STR27##   CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                     131       CH.sub.2 CCH CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                     132       CH.sub.2 CF.sub.2 CF.sub.3                                                                   ##STR28##                                                                              2 CH.sub.3                                     133                                                                                       ##STR29##                                                                                   ##STR30##                                                                              2 CH.sub.3                                     134       (CH.sub.2).sub.3 CH.sub.3                                                                    ##STR31##                                                                              2 CH.sub.3                                     135       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                                ##STR32##                                                                              2 CH.sub.3                                     136       CH.sub.2 CH(CH.sub.3).sub.2                                                                  ##STR33##                                                                              2 CH.sub.3                                     137       C(CH.sub.3).sub.3                                                                            ##STR34##                                                                              2 CH.sub.3                                     138                                                                                       ##STR35##                                                                                   ##STR36##                                                                              2 CH.sub.3                                     139       CH.sub.2 CCH                                                                                 ##STR37##                                                                              2 CH.sub.3                                     140       CH.sub.2 CF.sub.2 CF.sub.3                                                                  (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                     141       (CH.sub.2).sub.3 CH.sub.3                                                                   (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                     142       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                     143       CH.sub.2 CH(CH.sub.3).sub.2                                                                 (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                     144       C(CH.sub.3).sub.3                                                                           (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                     145                                                                                       ##STR38##   (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                     146       CH.sub.2 CCH (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                     147       CH.sub.2 CF.sub.2 CF.sub.3                                                                  CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                     148       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                     149       CH.sub.2 CH(CH.sub.3).sub.2                                                                 CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                     150       C(CH.sub.3).sub.3                                                                           CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                     151                                                                                       ##STR39##   CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                     152       CH.sub.2 CCH CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                     153       CH.sub.2 CF.sub.2 CF.sub.3                                                                  CH.sub.2 CH(CH.sub.3).sub.2                                                             2 CH.sub.3                                     154       CH.sub.2 CH(CH.sub.3).sub.2                                                                 CH.sub.2 CH(CH.sub.3).sub.2                                                             2 CH.sub.3                                     155       C(CH.sub.3).sub.3                                                                           CH.sub.2 CH(CH.sub.3).sub.2                                                             2 CH.sub.3                                     156                                                                                       ##STR40##   CH.sub.2 CH(CH.sub.3).sub.2                                                             2 CH.sub.3                                     157       CH.sub.2 C CH                                                                               CH.sub.2 CH(CH.sub.3).sub.2                                                             2 CH.sub.3                                     158       CH.sub.2 CF.sub.2 CF.sub.3                                                                  C(CH.sub.3).sub.3                                                                       2 CH.sub.3                                     159       C(CH.sub.3).sub.3                                                                           C(CH.sub.3).sub.3                                                                       2 CH.sub.3                                     160                                                                                       ##STR41##   C(CH.sub.3).sub.3                                                                       2 CH.sub.3                                     161       CH.sub.2 CCH C(CH.sub.3).sub.3                                                                       2 CH.sub.3                                     162       CH.sub.2 CF.sub.2 CF.sub.3                                                                   ##STR42##                                                                              2 CH.sub.3                                     163                                                                                       ##STR43##                                                                                   ##STR44##                                                                              2 CH.sub.3                                     164       CH.sub.2 CCH                                                                                 ##STR45##                                                                              2 CH.sub.3                                     165       CH.sub.2 CF.sub.2 CF.sub.3                                                                  CH.sub.2 CCH                                                                            2 CH.sub.3                                     166       CH.sub.2 CCH CH.sub.2 CCH                                                                            2 CH.sub.3                                     167       CH.sub.3 CF.sub.2 CF.sub.3                                                                  CH.sub.2 CF.sub.2 CF.sub.3                                                              2 CH.sub. 3                                    168       H            H        1 CH.sub.3                                     169       CH.sub.3     H        1 CH.sub.3                                     170       C.sub.2 H.sub.5                                                                             H        1 CH.sub.3                                     171       CH.sub.2 CF.sub.3                                                                           H        1 CH.sub.3                                     172       CH.sub.2 CF.sub.2 CF.sub.3                                                                  H        1 CH.sub.3                                     173       CH.sub.2 CH.sub.2 CH.sub.3                                                                  H        1 CH.sub.3                                     174       CH.sub.2 CH.sub.2 CF.sub.3                                                                  H        1 CH.sub.3                                     175       CH(CF.sub.3)CH.sub.3                                                                        H        1 CH.sub.3                                     176                                                                                       ##STR46##   H        1 CH.sub.3                                     177       (CH.sub.2).sub.3 CH.sub.3                                                                   H        1 CH.sub.3                                     178       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               H        1 CH.sub.3                                     179       CH.sub.2 CH(CH.sub.3).sub.2                                                                 H        1 CH.sub.3                                     180       C(CH.sub.3).sub.3                                                                           H        1 CH.sub.3                                     181                                                                                       ##STR47##   H        1 CH.sub.3                                     182       H            CH.sub.3 1 CH.sub.3                                     183       CH.sub.3     CH.sub.3 1 CH.sub.3                                     184       C.sub.2 H.sub.5                                                                             CH.sub.3 1 CH.sub.3                                     185       CH.sub.2 CF.sub.3                                                                           CH.sub.3 1 CH.sub.3                                     186       CH.sub.2 CF.sub.2 CF.sub.3                                                                  CH.sub.3 1 CH.sub.3                                     187       CH.sub.2 CH.sub.2 CH.sub.3                                                                  CH.sub.3 1 CH.sub.3                                     188       CH.sub.2 CH.sub.2 CF.sub.3                                                                  CH.sub.3 1 CH.sub.3                                     189       CH(CH.sub.3).sub.2                                                                          CH.sub.3 1 CH.sub.3                                     190       CH(CF.sub.3)CH.sub.3                                                                        CH.sub.3 1 CH.sub.3                                     191                                                                                       ##STR48##   CH.sub.3 1 CH.sub.3                                     192       (CH.sub.2).sub.3 CH.sub.3                                                                   CH.sub.3 1 CH.sub.3                                     193       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               CH.sub.3 1 CH.sub.3                                     194       CH.sub.2 CH(CH.sub.3).sub.2                                                                 CH.sub.3 1 CH.sub.3                                     195       C(CH.sub.3).sub.3                                                                           CH.sub.3 1 CH.sub.3                                     196                                                                                       ##STR49##   CH.sub.3 1 CH.sub.3                                     197       H            H        0 CH.sub.3                                     198       CH.sub.3     H        0 CH.sub.3                                     199       C.sub.2 H.sub.5                                                                             H        0 CH.sub.3                                     200       CH.sub.2 CF.sub.3                                                                           H        0 CH.sub.3                                     201       CH.sub.2 CF.sub.2 CF.sub.3                                                                  H        0 CH.sub.3                                     202       CH.sub.2 CH.sub.2 CH.sub.3                                                                  H        0 CH.sub.3                                     203       CH.sub.2 CH.sub.2 CF.sub.3                                                                  H        0 CH.sub.3                                     204       CH(CF.sub.3)CH.sub.3                                                                        H        0 CH.sub.3                                     205                                                                                       ##STR50##   H        0 CH.sub.3                                     206       (CH.sub.2).sub.3 CH.sub.3                                                                   H        0 CH.sub.3                                     207       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               H        0 CH.sub.3                                     208       CH.sub.2 CH(CH.sub.3).sub.2                                                                 H        0 CH.sub.3                                     209       C(CH.sub.3).sub.3                                                                           H        0 CH.sub.3                                     210                                                                                       ##STR51##   H        0 CH.sub.3                                     211       H            CH.sub.3 0 CH.sub.3                                     212       CH.sub.3     CH.sub.3 0 CH.sub.3                                     213       C.sub.2 H.sub.5                                                                             CH.sub.3 0 CH.sub.3                                     214       CH.sub.2 CF.sub.3                                                                           CH.sub.3 0 CH.sub.3                                     215       CH.sub.2 CF.sub.2 CF.sub.3                                                                  CH.sub.3 0 CH.sub.3                                     216       CH.sub.2 CH.sub.2 CH.sub.3                                                                  CH.sub.3 0 CH.sub.3                                     217       CH.sub.2 CH.sub.2 CF.sub.3                                                                  CH.sub.3 0 CH.sub.3                                     218       CH(CH.sub.3).sub.2                                                                          CH.sub.3 0 CH.sub.3                                     219       CH(CF.sub.3)CH.sub.3                                                                        CH.sub.3 0 CH.sub.3                                     220                                                                                       ##STR52##   CH.sub.3 0 CH.sub.3                                     221       (CH.sub.2).sub.3 CH.sub.3                                                                   CH.sub.3 0 CH.sub.3                                     222       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               CH.sub.3 0 CH.sub.3                                     223       CH.sub.2 CH(CH.sub.3).sub.2                                                                 CH.sub.3 0 CH.sub.3                                     224       C(CH.sub.3).sub.3                                                                           CH.sub.3 0 CH.sub.3                                     225                                                                                       ##STR53##   CH.sub.3 0 CH.sub.3                                     __________________________________________________________________________

                                      TABLE IB                                     __________________________________________________________________________      ##STR54##                                                                     COMPOUND NO                                                                              R.sup.1     R.sup.2   n  R.sup.3                                     __________________________________________________________________________      49       CH(CH.sub.3).sub.2                                                                         H         2  CH.sub.3                                    226       CH(CH.sub.3).sub.2                                                                         CH.sub.3  2  CH.sub.3                                    227       cyclopropyl H         2  CH.sub.3                                    228       CH(CH.sub.3).sub.2                                                                         CH.sub.3  2                                                                                  ##STR55##                                  229       CH.sub.2 CF.sub.3                                                                          H         2  CH.sub.3                                    230       COCH.sub.3  H         2  CH.sub.3                                    231       CH(CH.sub.3)(CH.sub.2).sub.4 CH.sub.3                                                      H         2  CH.sub.3                                    232       OCH.sub.3   CH.sub.3  2  CH.sub.3                                    233       CH.sub.2 CH.sub.2 OCH.sub.3                                                                H         2  CH.sub.3                                    234       phenyl      H         2  CH.sub.3                                    235       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              H         2  CH.sub.3                                    236       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              H         2  C.sub.2 H.sub.5                             237       CH(CH.sub.3).sub.2                                                                         H         2  CF.sub.3                                    238       CH(CH.sub.3).sub.2                                                                         H         2  C.sub.2 H.sub.5                             239       CH(CH.sub.3).sub. 2                                                                        CH.sub.3  2  C.sub.2 H.sub.5                             240       CH(CH.sub.3).sub.2                                                                         CH.sub.3  2  CF.sub.3                                    241       CH(CH.sub.3).sub.2                                                                         H         2  CH.sub.2 CF.sub.3                           242       CH(CH.sub.3).sub.2                                                                         H         2  phenyl                                      243       CH(CH.sub.3).sub.2                                                                         H         2                                                                                  ##STR56##                                  244       CH(CH.sub.3).sub.2                                                                         H         2  CH.sub.2 CH.sub.2 CH.sub.3                  245       CH(CH.sub.3).sub.2                                                                         H         2  (CF.sub.2).sub.5 CF.sub.3                   246       CH(CH.sub.3).sub.2                                                                         H         2  (CH.sub.2).sub.3 CH.sub.3                   247       CH(CH.sub.3).sub.2                                                                         H         2                                                                                  ##STR57##                                  248       CH(CH.sub.3).sub.2                                                                         H         2                                                                                  ##STR58##                                  249       CH(CH.sub.3).sub.2                                                                         H         2                                                                                  ##STR59##                                  250       CH(CH.sub.3).sub.2                                                                         H         2  CH.sub.2 Cl                                 251       CH(CH.sub.3).sub.2                                                                         H         2  CH.sub.2 CH.sub.2 CH.sub.2 Cl               252       CH(CH.sub.3).sub.2                                                                         H         2                                                                                  ##STR60##                                  253       CH(CH.sub.3).sub.2                                                                         H         2                                                                                  ##STR61##                                  254       CH(CH.sub.3).sub.2                                                                         H         2  CHCl.sub.2                                  255                                                                                       ##STR62##  H         2  C.sub.2 H.sub.5                             256       H           H         2  CH.sub.3                                    257       CH(CH.sub.3).sub.2                                                                         H         2  CHCH.sub.2                                  258       CH(CH.sub.3).sub.2                                                                         CH(CH.sub.3).sub.2                                                                       2  CH.sub.3                                    259                                                                                       ##STR63##  CH.sub.3  2  CH.sub.3                                    260       (CH.sub.2).sub.2 CH.sub.3                                                                  (CH.sub.2).sub.2 CH.sub.3                                                                2  CH.sub.3                                    261       C.sub.2 H.sub.5                                                                            C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    262       (CH.sub.2).sub.2 CH.sub.3                                                                  CH.sub.3  2  CH.sub.3                                    263       CH.sub.3    CH.sub.3  2  CH.sub.3                                    264       CH.sub.2 CH(CH.sub.3).sub.2                                                                H         2  CH.sub.3                                    265       C.sub.2 H.sub.5                                                                            CH.sub.3  2  CH.sub.3                                    266       CH.sub.2 CF.sub.2 CF.sub.3                                                                 H         2  CH.sub.3                                    267       CH.sub.2 CH.sub.2 CH.sub.2 Cl                                                              CH.sub.3  2  CH.sub.3                                    268       CH(CH.sub.3)CF.sub.3                                                                       H         2  CH.sub.3                                    269       (CH.sub.2).sub.2 CF.sub.3                                                                  H         2  CH.sub. 3                                   270       CH.sub.3    H         2  CH.sub.3                                    271       CH.sub.2 CCH                                                                               CH.sub.3  2  CH.sub.3                                    272       C(CH.sub.3).sub.3                                                                          H         2  CH.sub.3                                    273       CH(CH.sub.3).sub.2                                                                         H         0  CH.sub.3                                    274       CH(CH.sub.3).sub.2                                                                         H         1  CH.sub.3                                    275       C.sub.2 H.sub.5                                                                            H         2  CH.sub.3                                    276       CH.sub.2 CH.sub.2 CH.sub.3                                                                 H         2  CH.sub.3                                    277       (CH.sub.2).sub.3 CH.sub.3                                                                  H         2  CH.sub.3                                    278                                                                                       ##STR64##  H         2  CH.sub.3                                    279       CH.sub.2 CCH                                                                               H         2  CH.sub.3                                    280       CH.sub.2 CF.sub.3                                                                          CH.sub.3  2  CH.sub.3                                    281       CH.sub.2 CF.sub.2 CF.sub.3                                                                 CH.sub.3  2  CH.sub.3                                    282       CH.sub.2 CH.sub.2 CF.sub.3                                                                 CH.sub.3  2  CH.sub.3                                    283       CH(CF.sub.3)CH.sub.3                                                                       CH.sub.3  2  CH.sub.3                                    284                                                                                       ##STR65##  CH.sub.3  2  CH.sub.3                                    285       (CH.sub.2).sub.3 CH.sub.3                                                                  CH.sub.3  2  CH.sub.3                                    286       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              CH.sub.3  2  CH.sub.3                                    287       CH.sub.2 CH(CH.sub.3).sub.2                                                                CH.sub.3  2  CH.sub.3                                    288       C(CH.sub.3).sub.3                                                                          CH.sub.3  2  CH.sub.3                                    289       CH.sub.2 CF.sub.3                                                                          C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    290       CH.sub.2 CF.sub.2 CF.sub.3                                                                 C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    291       CH.sub.2 CH.sub.2 CH.sub.3                                                                 C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    292       CH.sub.2 CH.sub.2 CF.sub.3                                                                 C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    293       CH(CH.sub.3).sub.2                                                                         C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    294       CH(CF.sub.3)CH.sub.3                                                                       C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    295                                                                                       ##STR66##  C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    296       (CH.sub.2).sub.3 CH.sub.3                                                                  C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    297       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    298       CH.sub.2 CH(CH.sub.3).sub.2                                                                C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    299       C(CH.sub.3).sub.3                                                                          C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    300                                                                                       ##STR67##  C.sub.2 H.sub.5                                                                          2  CH.sub. 3                                   301       CH.sub.2 CCH                                                                               C.sub.2 H.sub.5                                                                          2  CH.sub.3                                    302       CH.sub.2 CF.sub.2 CF.sub.3                                                                 CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    303       CH.sub.2 CH.sub.2 CH.sub.3                                                                 CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    304       CH.sub.2 CH.sub.2 CF.sub.3                                                                 CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    305       CH(CH.sub.3).sub.2                                                                         CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    306       CH(CF.sub.3)CH.sub.3                                                                       CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    307                                                                                       ##STR68##  CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    308       (CH.sub.2).sub.3 CH.sub.3                                                                  CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    309       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    310       CH.sub.2 CH(CH.sub.3).sub.2                                                                CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    311       C(CH.sub.3).sub.3                                                                          CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    312                                                                                       ##STR69##  CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    313       CH.sub.2 CCH                                                                               CH.sub.2 CF.sub.3                                                                        2  CH.sub.3                                    314       CH.sub.2 CH.sub.2 CF.sub.3                                                                 CH.sub.2 CH.sub.2 CH.sub.3                                                               2  CH.sub.3                                    315       CH(CH.sub.3).sub.2                                                                         CH.sub.2 CH.sub.2 CH.sub.3                                                               2  CH.sub.3                                    316       CH(CF.sub.3)CH.sub.3                                                                       CH.sub.2 CH.sub.2 CH.sub.3                                                               2  CH.sub.3                                    317                                                                                       ##STR70##  CH.sub.2 CH.sub.2 CH.sub.3                                                               2  CH.sub.3                                    318       (CH.sub.2).sub.3 CH.sub.3                                                                  CH.sub.2 CH.sub.2 CH.sub.3                                                               2  CH.sub.3                                    319       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              CH.sub.2 CH.sub.2 CH.sub.3                                                               2  CH.sub.3                                    320       CH.sub.2 CH(CH.sub.3).sub.2                                                                CH.sub.2 CH.sub.2 CH.sub.3                                                               2  CH.sub.3                                    321       C(CH.sub.3).sub.3                                                                          CH.sub.2 CH.sub.2 CH.sub.3                                                               2  CH.sub.3                                    322                                                                                       ##STR71##  CH.sub.2 CH.sub.2 CH.sub.3                                                               2  CH.sub.3                                    323       CH.sub.2 C CH                                                                              CH.sub.2 CH.sub.2 CH.sub.3                                                               2  CH.sub.3                                    324       CH.sub.2 CF.sub.2 CF.sub.3                                                                 CH.sub.2 CH.sub.2 CH.sub.3                                                               2  CH.sub.3                                    325       CH.sub.2 CF.sub.2 CF.sub.3                                                                 CH.sub.2 CH.sub.2 CF.sub.3                                                               2  CH.sub.3                                    326       CH.sub.2 CH.sub.2 CF.sub.3                                                                 CH.sub.2 CH.sub.2 CF.sub.3                                                               2  CH.sub.3                                    327       CH(CH.sub.3).sub.2                                                                         CH.sub.2 CH.sub.2 CF.sub.3                                                               2  CH.sub.3                                    328       CH(CF.sub.3)CH.sub.3                                                                       CH.sub.2 CH.sub.2 CF.sub.3                                                               2  CH.sub.3                                    329                                                                                       ##STR72##  CH.sub.2 CH.sub.2 CF.sub.3                                                               2  CH.sub.3                                    330       (CH.sub.2).sub.3 CH.sub.3                                                                  CH.sub.2 CH.sub.2 CF.sub.3                                                               2  CH.sub.3                                    331       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              CH.sub.2 CH.sub.2 CF.sub.3                                                               2  CH.sub.3                                    332       CH.sub.2 CH(CH.sub.3).sub.2                                                                CH.sub.2 CH.sub.2 CF.sub.3                                                               2  CH.sub.3                                    333       C(CH.sub.3).sub.3                                                                          CH.sub.2 CH.sub.2 CF.sub.3                                                               2  CH.sub.3                                    334                                                                                       ##STR73##  CH.sub.2 CH.sub.2 CF.sub.3                                                               2  CH.sub.3                                    335       CH.sub.2 C CH                                                                              CH.sub.2 CH.sub.2 CF.sub.3                                                               2  CH.sub.3                                    336       CH.sub.2 CF.sub.2 CF.sub.3                                                                 CH(CH.sub.3).sub.2                                                                       2  CH.sub.3                                    337       CH(CF.sub.3)CH.sub.3                                                                       CH(CH.sub.3).sub.2                                                                       2  CH.sub.3                                    338                                                                                       ##STR74##  CH(CH.sub.3).sub.2                                                                       2  CH.sub.3                                    339       (CH.sub.2).sub.3 CH.sub.3                                                                  CH(CH.sub.3).sub.2                                                                       2  CH.sub.3                                    340       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              CH(CH.sub.3).sub.2                                                                       2  CH.sub.3                                    341       CH.sub.2 CH(CH.sub.3).sub.2                                                                CH(CH.sub.3).sub.2                                                                       2  CH.sub.3                                    342       C(CH.sub.3).sub.3                                                                          CH(CH.sub.3).sub.2                                                                       2  CH.sub.3                                    343                                                                                       ##STR75##  CH(CH.sub.3).sub.2                                                                       2  CH.sub.3                                    344       CH.sub.2CCH CH(CH.sub.3).sub.2                                                                       2  CH.sub.3                                    345       CH.sub.2 CF.sub.2 CF.sub.3                                                                 CH(CF.sub.3)CH.sub.3                                                                     2  CH.sub.3                                    346       CH(CF.sub.3)CH.sub.3                                                                       CH(CF.sub.3)CH.sub.3                                                                     2  CH.sub.3                                    347                                                                                       ##STR76##  CH(CF.sub.3)CH.sub.3                                                                     2  CH.sub.3                                    348       (CH.sub.2).sub.3 CH.sub.3                                                                  CH(CF.sub.3)CH.sub.3                                                                     2  CH.sub.3                                    349       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              CH(CF.sub.3)CH.sub.3                                                                     2  CH.sub.3                                    350       CH.sub.2 CH(CH.sub.3).sub.2                                                                CH(CF.sub.3)CH.sub.3                                                                     2  CH.sub. 3                                   351       C(CH.sub.3).sub.3                                                                          CH(CF.sub.3)CH.sub.3                                                                     2  CH.sub.3                                    352                                                                                       ##STR77##  CH(CF.sub.3)CH.sub.3                                                                     2  CH.sub.3                                    353       CH.sub.2 CCH                                                                               CH(CF.sub.3)CH.sub.3                                                                     2  CH.sub.3                                    354       CH.sub.2 CF.sub.2 CF.sub.3                                                                  ##STR78##                                                                               2  CH.sub.3                                    355                                                                                       ##STR79##                                                                                  ##STR80##                                                                               2  CH.sub.3                                    356       (CH.sub.2).sub.3 CH.sub.3                                                                   ##STR81##                                                                               2  CH.sub.3                                    357       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                               ##STR82##                                                                               2  CH.sub.3                                    358       CH.sub.2 CH(CH.sub.3).sub.2                                                                 ##STR83##                                                                               2  CH.sub.3                                    359       C(CH.sub.3).sub.3                                                                           ##STR84##                                                                               2  CH.sub.3                                    360                                                                                       ##STR85##                                                                                  ##STR86##                                                                               2  CH.sub.3                                    361       CH.sub.2 CCH                                                                                ##STR87##                                                                               2  CH.sub.3                                    362       CH.sub.2 CF.sub.2 CF.sub.3                                                                 (CH.sub.2).sub.3 CH.sub.3                                                                2  CH.sub.3                                    363       (CH.sub.2).sub.3 CH.sub.3                                                                  (CH.sub.2).sub.3 CH.sub.3                                                                2  CH.sub.3                                    364       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              (CH.sub.2).sub.3 CH.sub.3                                                                2  CH.sub.3                                    365       CH.sub.2 CH(CH.sub.3).sub.2                                                                (CH.sub.2).sub.3 CH.sub.3                                                                2  CH.sub.3                                    366       C(CH.sub.3).sub.3                                                                          (CH.sub.2).sub.3 CH.sub.3                                                                2  CH.sub.3                                    367                                                                                       ##STR88##  (CH.sub.2).sub.3 CH.sub.3                                                                2  CH.sub.3                                    368       CH.sub.2 CCH                                                                               (CH.sub.2).sub.3 CH.sub.3                                                                2  CH.sub.3                                    369       CH.sub.2 CF.sub.2 CF.sub.3                                                                 CH(CH.sub.3)CH.sub.2 CH.sub.3                                                            2  CH.sub.3                                    370       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              CH(CH.sub.3)CH.sub.2 CH.sub.3                                                            2  CH.sub.3                                    371       CH.sub.2 CH(CH.sub.3).sub.2                                                                CH(CH.sub.3)CH.sub.2 CH.sub.3                                                            2  CH.sub.3                                    372       C(CH.sub.3).sub.3                                                                          CH(CH.sub.3)CH.sub.2 CH.sub.3                                                            2  CH.sub.3                                    373                                                                                       ##STR89##  CH(CH.sub.3)CH.sub.2 CH.sub.3                                                            2  CH.sub.3                                    374       CH.sub.2 CCH                                                                               CH(CH.sub.3)CH.sub.2 CH.sub.3                                                            2  CH.sub.3                                    375       CH.sub.2 CF.sub.2 CF.sub.3                                                                 CH.sub.2 CH(CH.sub.3).sub.2                                                              2  CH.sub.3                                    376       CH.sub.2 CH(CH.sub.3).sub.2                                                                CH.sub.2 CH(CH.sub.3).sub.2                                                              2  CH.sub.3                                    377       C(CH.sub.3).sub.3                                                                          CH.sub.2 CH(CH.sub.3).sub.2                                                              2  CH.sub.3                                    378                                                                                       ##STR90##  CH.sub.2 CH(CH.sub.3).sub.2                                                              2  CH.sub.3                                    379       CH.sub.2 CCH                                                                               CH.sub.2 CH(CH.sub.3).sub.2                                                              2  CH.sub.3                                    380       CH.sub.2 CF.sub.2 CF.sub.3                                                                 C(CH.sub.3).sub.3                                                                        2  CH.sub.3                                    381       C(CH.sub.3).sub.3                                                                          C(CH.sub.3).sub.3                                                                        2  CH.sub.3                                    382                                                                                       ##STR91##  C(CH.sub.3).sub.3                                                                        2  CH.sub.3                                    383       CH.sub.2 CCH                                                                               C(CH.sub.3).sub.3                                                                        2  CH.sub.3                                    384       CH.sub.2 CF.sub.2 CF.sub.3                                                                  ##STR92##                                                                               2  CH.sub.3                                    385                                                                                       ##STR93##                                                                                  ##STR94##                                                                               2  CH.sub.3                                    386       CH.sub.2 CCH                                                                                ##STR95##                                                                               2  CH.sub.3                                    387       CH.sub.2 CF.sub.2 CF.sub.3                                                                 CH.sub.2 CCH                                                                             2  CH.sub.3                                    388       CH.sub.2 CCH                                                                               CH.sub.2 CCH                                                                             2  CH.sub.3                                    389       CH.sub.3 CF.sub.2 CF.sub.3                                                                 CH.sub.2 CF.sub.2 CF.sub.3                                                               2  CH.sub.3                                    390       H           H         1  CH.sub.3                                    391       CH.sub.3    H         1  CH.sub.3                                    392       C.sub.2 H.sub.5                                                                            H         1  CH.sub.3                                    393       CH.sub.2 CF.sub. 3                                                                         H         1  CH.sub.3                                    394       CH.sub.2 CF.sub.2 CF.sub.3                                                                 H         1  CH.sub.3                                    395       CH.sub.2 CH.sub.2 CH.sub.3                                                                 H         1  CH.sub.3                                    396       CH.sub.2 CH.sub.2 CF.sub.3                                                                 H         1  CH.sub.3                                    397       CH(CF.sub.3)CH.sub.3                                                                       H         1  CH.sub.3                                    398                                                                                       ##STR96##  H         1  CH.sub.3                                    399       (CH.sub.2).sub.3 CH.sub.3                                                                  H         1  CH.sub.3                                    400       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              H         1  CH.sub.3                                    401       CH.sub.2 CH(CH.sub.3).sub.2                                                                H         1  CH.sub.3                                    402       C(CH.sub.3).sub.3                                                                          H         1  CH.sub.3                                    403                                                                                       ##STR97##  H         1  CH.sub.3                                    404       H           CH.sub.3  1  CH.sub.3                                    405       CH.sub.3    CH.sub.3  1  CH.sub.3                                    406       C.sub.2 H.sub.5                                                                            CH.sub.3  1  CH.sub.3                                    407       CH.sub.2 CF.sub.3                                                                          CH.sub.3  1  CH.sub.3                                    408       CH.sub.2 CF.sub.2 CF.sub.3                                                                 CH.sub.3  1  CH.sub.3                                    409       CH.sub.2 CH.sub.2 CH.sub.3                                                                 CH.sub.3  1  CH.sub.3                                    410       CH.sub.2 CH.sub.2 CF.sub.3                                                                 CH.sub.3  1  CH.sub.3                                    411       CH(CH.sub.3 ).sub.2                                                                        CH.sub.3  1  CH.sub.3                                    412       CH(CF.sub.3)CH.sub.3                                                                       CH.sub.3  1  CH.sub.3                                    413                                                                                       ##STR98##  CH.sub.3  1  CH.sub.3                                    414       (CH.sub.2).sub.3 CH.sub.3                                                                  CH.sub.3  1  CH.sub.3                                    415       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              CH.sub.3  1  CH.sub.3                                    416       CH.sub.2 CH(CH.sub.3).sub.2                                                                CH.sub.3  1  CH.sub.3                                    417       C(CH.sub.3).sub.3                                                                          CH.sub.3  1  CH.sub.3                                    418                                                                                       ##STR99##  CH.sub.3  1  CH.sub.3                                    419       H           H         0  CH.sub.3                                    420       CH.sub.3    H         0  CH.sub.3                                    421       C.sub.2 H.sub.5                                                                            H         0  CH.sub.3                                    422       CH.sub.2 CF.sub.3                                                                          H         0  CH.sub.3                                    423       CH.sub.2 CF.sub.2 CF.sub.3                                                                 H         0  CH.sub.3                                    424       CH.sub.2 CH.sub.2 CH.sub.3                                                                 H         0  CH.sub.3                                    425       CH.sub.2 CH.sub.2 CF.sub.3                                                                 H         0  CH.sub.3                                    426       CH(CF.sub.3)CH.sub.3                                                                       H         0  CH.sub.3                                    427                                                                                       ##STR100## H         0  CH.sub.3                                    428       (CH.sub.2).sub.3 CH.sub.3                                                                  H         0  CH.sub.3                                    429       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              H         0  CH.sub.3                                    430       CH.sub.2 CH(CH.sub.3).sub.2                                                                H         0  CH.sub.3                                    431       C(CH.sub.3).sub.3                                                                          H         0  CH.sub.3                                    432                                                                                       ##STR101## H         0  CH.sub.3                                    433       H           CH.sub.3  0  CH.sub.3                                    434       CH.sub.3    CH.sub.3  0  CH.sub.3                                    435       C.sub.2 H.sub.5                                                                            CH.sub.3  0  CH.sub.3                                    436       CH.sub.2 CF.sub.3                                                                          CH.sub.3  0  CH.sub.3                                    437       CH.sub.2 CF.sub.2 CF.sub.3                                                                 CH.sub.3  0  CH.sub.3                                    438       CH.sub.2 CH.sub.2 CH.sub.3                                                                 CH.sub.3  0  CH.sub.3                                    439       CH.sub.2 CH.sub.2 CF.sub.3                                                                 CH.sub.3  0  CH.sub.3                                    440       CH(CH.sub.3).sub.2                                                                         CH.sub.3  0  CH.sub.3                                    441       CH(CF.sub.3)CH.sub.3                                                                       CH.sub.3  0  CH.sub.3                                    442                                                                                       ##STR102## CH.sub.3  0  CH.sub.3                                    443       (CH.sub.2).sub.3 CH.sub.3                                                                  CH.sub.3  0  CH.sub.3                                    444       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              CH.sub.3  0  CH.sub.3                                    445       CH.sub.2 CH(CH.sub.3).sub.2                                                                CH.sub.3  0  CH.sub.3                                    446       C(CH.sub.3).sub.3                                                                          CH.sub.3  0  CH.sub.3                                    447                                                                                       ##STR103## CH.sub.3  0  CH.sub.3                                    __________________________________________________________________________

                                      TABLE IC                                     __________________________________________________________________________      ##STR104##                                                                    COMPOUND NO                                                                              R.sup.1    R.sup.2  n R.sup.3                                        __________________________________________________________________________      50       CH(CH.sub.3).sub.2                                                                        H        2 CH.sub.3                                       448       CH(CH.sub.3).sub.2                                                                        CH.sub.3 2 CH.sub.3                                       449       cyclopropyl                                                                               H        2 CH.sub.3                                       450       CH(CH.sub.3).sub.2                                                                        CH.sub.3 2                                                                                 ##STR105##                                    451       CH.sub.2 CF.sub.3                                                                         H        2 CH.sub.3                                       452       COCH.sub.3 H        2 CH.sub.3                                       453       CH(CH.sub.3)(CH.sub.2).sub.4 CH.sub.3                                                     H        2 CH.sub.3                                       454       OCH.sub.3  CH.sub.3 2 CH.sub.3                                       455       CH.sub.2 CH.sub.2 OCH.sub.3                                                               H        2 CH.sub.3                                       456       phenyl     H        2 CH.sub.3                                       457       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             H        2 CH.sub.3                                       458       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             H        2 C.sub.2 H.sub.5                                459       CH(CH.sub.3).sub.2                                                                        H        2 CF.sub.3                                       460       CH(CH.sub.3).sub.2                                                                        H        2 C.sub.2 H.sub.5                                461       CH(CH.sub.3).sub.2                                                                        CH.sub.3 2 C.sub.2 H.sub.5                                462       CH(CH.sub.3).sub.2                                                                        CH.sub.3 2 CF.sub.3                                       463       CH(CH.sub.3).sub.2                                                                        H        2 CH.sub.2 CF.sub.3                              464       CH(CH.sub.3).sub.2                                                                        H        2 phenyl                                         465       CH(CH.sub.3).sub.2                                                                        H        2                                                                                 ##STR106##                                    466       CH(CH.sub.3).sub.2                                                                        H        2 CH.sub.2 CH.sub.2 CH.sub.3                     467       CH(CH.sub.3).sub.2                                                                        H        2 (CF.sub.2).sub.5 CF.sub.3                      468       CH(CH.sub.3).sub.2                                                                        H        2 (CH.sub.2).sub.3 CH.sub.3                      469       CH(CH.sub.3).sub.2                                                                        H        2                                                                                 ##STR107##                                    470       CH(CH.sub.3).sub.2                                                                        H        2                                                                                 ##STR108##                                    471       CH(CH.sub.3).sub.2                                                                        H        2                                                                                 ##STR109##                                    472       CH(CH.sub.3).sub.2                                                                        H        2 CH.sub.2 Cl                                    473       CH(CH.sub.3).sub.2                                                                        H        2 CH.sub.2 CH.sub.2 CH.sub.2 Cl                  474       CH(CH.sub.3).sub.2                                                                        H        2                                                                                 ##STR110##                                    475       CH(CH.sub.3).sub.2                                                                        H        2                                                                                 ##STR111##                                    476       CH(CH.sub.3).sub.2                                                                        H        2 CHCl.sub.2                                     477                                                                                       ##STR112##                                                                               H        2 C.sub.2 H.sub.5                                478       H          H        2 CH.sub.3                                       479       CH(CH.sub.3).sub.2                                                                        H        2 CHCH.sub.2                                     480       CH(CH.sub.3).sub.2                                                                        CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                       481                                                                                       ##STR113##                                                                               CH.sub.3 2 CH.sub.3                                       482       (CH.sub.2).sub.2 CH.sub.3                                                                 (CH.sub.2).sub.2 CH.sub.3                                                               2 CH.sub.3                                       483       C.sub.2 H.sub.5                                                                           C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       484       (CH.sub.2).sub.2 CH.sub.3                                                                 CH.sub.3 2 CH.sub.3                                       485       CH.sub.3   CH.sub.3 2 CH.sub.3                                       486       CH.sub.2 CH(CH.sub.3).sub.2                                                               H        2 CH.sub.3                                       487       C.sub.2 H.sub.5                                                                           CH.sub.3 2 CH.sub.3                                       488       CH.sub.2 CF.sub.2 CF.sub.3                                                                H        2 CH.sub.3                                       489       CH.sub.2 CH.sub.2 CH.sub.2 Cl                                                             CH.sub.3 2 CH.sub.3                                       490       CH(CH.sub.3)CF.sub.3                                                                      H        2 CH.sub.3                                       491       (CH.sub.2).sub.2 CF.sub.3                                                                 H        2 CH.sub.3                                       492       CH.sub.3   H        2 CH.sub.3                                       493       CH.sub.2 CCH                                                                              CH.sub.3 2 CH.sub.3                                       494       C(CH.sub.3).sub.3                                                                         H        2 CH.sub.3                                       495       CH(CH.sub.3).sub.2                                                                        H        0 CH.sub.3                                       496       CH(CH.sub.3).sub.2                                                                        H        1 CH.sub.3                                       497       C.sub.2 H.sub.5                                                                           H        2 CH.sub.3                                       498       CH.sub.2 CH.sub.2 CH.sub.3                                                                H        2 CH.sub.3                                       499       (CH.sub.2).sub.3 CH.sub.3                                                                 H        2 CH.sub.3                                       500                                                                                       ##STR114##                                                                               H        2 CH.sub.3                                       501       CH.sub.2 CCH                                                                              H        2 CH.sub.3                                       502       CH.sub.2 CF.sub.3                                                                         CH.sub.3 2 CH.sub.3                                       503       CH.sub.2 CF.sub.2 CF.sub.3                                                                CH.sub.3 2 CH.sub.3                                       504       CH.sub.2 CH.sub.2 CF.sub.3                                                                CH.sub.3 2 CH.sub.3                                       505       CH(CF.sub.3)CH.sub.3                                                                      CH.sub.3 2 CH.sub.3                                       506                                                                                       ##STR115##                                                                               CH.sub.3 2 CH.sub.3                                       507       (CH.sub.2).sub.3 CH.sub.3                                                                 CH.sub.3 2 CH.sub.3                                       508       CH(CH.sub.3 )CH.sub.2 CH.sub.3                                                            CH.sub.3 2 CH.sub.3                                       509       CH.sub.2 CH(CH.sub.3).sub.2                                                               CH.sub.3 2 CH.sub.3                                       510       C(CH.sub.3).sub.3                                                                         CH.sub.3 2 CH.sub.3                                       511       CH.sub.2 CF.sub.3                                                                         C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       512       CH.sub.2 CF.sub.2 CF.sub.3                                                                C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       513       CH.sub.2 CH.sub.2 CH.sub.3                                                                C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       514       CH.sub.2 CH.sub.2 CF.sub.3                                                                C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       515       CH(CH.sub.3).sub.2                                                                        C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       516       CH(CF.sub.3)CH.sub.3                                                                      C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       517                                                                                       ##STR116##                                                                               C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       518       (CH.sub.2).sub.3 CH.sub.3                                                                 C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       519       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       520       CH.sub.2 CH(CH.sub.3).sub.2                                                               C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       521       C(CH.sub.3).sub.3                                                                         C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       522                                                                                       ##STR117##                                                                               C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       523       CH.sub.2 CCH                                                                              C.sub.2 H.sub.5                                                                         2 CH.sub.3                                       524       CH.sub.2 CF.sub.2 CF.sub.3                                                                CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       525       CH.sub.2 CH.sub.2 CH.sub.3                                                                CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       526       CH.sub.2 CH.sub.2 CF.sub.3                                                                CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       527       CH(CH.sub.3).sub.2                                                                        CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       528       CH(CF.sub.3)CH.sub.3                                                                      CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       529                                                                                       ##STR118##                                                                               CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       530       (CH.sub.2).sub.3 CH.sub.3                                                                 CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       531       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       532       CH.sub.2 CH(CH.sub.3).sub.2                                                               CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       533       C(CH.sub.3).sub.3                                                                         CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       534                                                                                       ##STR119##                                                                               CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       535       CH.sub.2 C CH                                                                             CH.sub.2 CF.sub.3                                                                       2 CH.sub.3                                       536       CH.sub.2 CH.sub.2 CF.sub.3                                                                CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                       537       CH(CH.sub.3).sub.2                                                                        CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                       538       CH(CF.sub.3)CH.sub.3                                                                      CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                       539                                                                                       ##STR120##                                                                               CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                       540       (CH.sub.2).sub.3 CH.sub.3                                                                 CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                       541       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                       542       CH.sub.2 CH(CH.sub.3).sub.2                                                               CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                       543       C(CH.sub.3).sub.3                                                                         CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                       544                                                                                       ##STR121##                                                                               CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                       545       CH.sub.2 CCH                                                                              CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                       546       CH.sub.2 CF.sub.2 CF.sub.3                                                                CH.sub.2 CH.sub.2 CH.sub.3                                                              2 CH.sub.3                                       547       CH.sub.2 CF.sub.2 CF.sub.3                                                                CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                       548       CH.sub.2 CH.sub.2 CF.sub.3                                                                CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                       549       CH(CH.sub.3).sub.2                                                                        CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                       550       CH(CF.sub.3)CH.sub.3                                                                      CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                       551                                                                                       ##STR122##                                                                               CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                       552       (CH.sub.2).sub.3 CH.sub.3                                                                 CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                       553       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                       554       CH.sub.2 CH(CH.sub.3).sub.2                                                               CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                       555       C(CH.sub.3).sub.3                                                                         CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                       556                                                                                       ##STR123##                                                                               CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                       557       CH.sub.2 CCH                                                                              CH.sub.2 CH.sub.2 CF.sub.3                                                              2 CH.sub.3                                       558       CH.sub.2 CF.sub.2 CF.sub.3                                                                CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                       559       CH(CF.sub.3)CH.sub.3                                                                      CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                       560                                                                                       ##STR124##                                                                               CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                       561       (CH.sub.2).sub.3 CH.sub.3                                                                 CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                       562       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                       563       CH.sub.2 CH(CH.sub.3).sub.2                                                               CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                       564       C(CH.sub.3).sub.3                                                                         CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                       565                                                                                       ##STR125##                                                                               CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                       566       CH.sub.2CCH                                                                               CH(CH.sub.3).sub.2                                                                      2 CH.sub.3                                       567       CH.sub.2 CF.sub.2 CF.sub.3                                                                CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                       568       CH(CF.sub.3)CH.sub.3                                                                      CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                       569                                                                                       ##STR126##                                                                               CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                       570       (CH.sub. 2).sub.3 CH.sub.3                                                                CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                       571       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                       572       CH.sub.2 CH(CH.sub.3).sub.2                                                               CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                       573       C(CH.sub.3).sub.3                                                                         CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                       574                                                                                       ##STR127##                                                                               CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                       575       CH.sub.2 CCH                                                                              CH(CF.sub.3)CH.sub.3                                                                    2 CH.sub.3                                       576       CH.sub.2 CF.sub.2 CF.sub.3                                                                 ##STR128##                                                                             2 CH.sub.3                                       577                                                                                       ##STR129##                                                                                ##STR130##                                                                             2 CH.sub.3                                       578       (CH.sub.2).sub.3 CH.sub.3                                                                  ##STR131##                                                                             2 CH.sub.3                                       579       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                              ##STR132##                                                                             2 CH.sub.3                                       580       CH.sub.2 CH(CH.sub.3 ).sub.2                                                               ##STR133##                                                                             2 CH.sub.3                                       581       C(CH.sub.3).sub.3                                                                          ##STR134##                                                                             2 CH.sub.3                                       582                                                                                       ##STR135##                                                                                ##STR136##                                                                             2 CH.sub.3                                       583       CH.sub.2 CCH                                                                               ##STR137##                                                                             2 CH.sub.3                                       584       CH.sub.2 CF.sub.2 CF.sub.3                                                                (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                       585       (CH.sub.2).sub.3 CH.sub.3                                                                 (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                       586       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                       587       CH.sub.2 CH(CH.sub.3).sub.2                                                               (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                       588       C(CH.sub.3).sub.3                                                                         (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                       589                                                                                       ##STR138##                                                                               (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub. 3                                      590       CH.sub.2 CCH                                                                              (CH.sub.2).sub.3 CH.sub.3                                                               2 CH.sub.3                                       591       CH.sub.2 CF.sub.2 CF.sub.3                                                                CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                       592       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                       593       CH.sub.2 CH(CH.sub.3).sub.2                                                               CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                       594       C(CH.sub.3).sub.3                                                                         CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                       595                                                                                       ##STR139##                                                                               CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                       596       CH.sub.2 CCH                                                                              CH(CH.sub.3)CH.sub.2 CH.sub.3                                                           2 CH.sub.3                                       597       CH.sub.2 CF.sub.2 CF.sub.3                                                                CH.sub.2 CH(CH.sub.3).sub.2                                                             2 CH.sub.3                                       598       CH.sub.2 CH(CH.sub.3).sub.2                                                               CH.sub.2 CH(CH.sub.3).sub.2                                                             2 CH.sub.3                                       599       C(CH.sub.3).sub.3                                                                         CH.sub.2 CH(CH.sub.3).sub.2                                                             2 CH.sub.3                                       600                                                                                       ##STR140##                                                                               CH.sub.2 CH(CH.sub.3 ).sub.2                                                            2 CH.sub.3                                       601       CH.sub.2 CCH                                                                              CH.sub.2 CH(CH.sub.3).sub.2                                                             2 CH.sub.3                                       602       CH.sub.2 CF.sub.2 CF.sub.3                                                                C(CH.sub.3).sub.3                                                                       2 CH.sub.3                                       603       C(CH.sub.3).sub.3                                                                         C(CH.sub.3).sub.3                                                                       2 CH.sub.3                                       604                                                                                       ##STR141##                                                                               C(CH.sub.3).sub.3                                                                       2 CH.sub.3                                       605       CH.sub.2 CCH                                                                              C(CH.sub.3).sub.3                                                                       2 CH.sub.3                                       606       CH.sub.2 CF.sub.2 CF.sub.3                                                                 ##STR142##                                                                             2 CH.sub.3                                       607                                                                                       ##STR143##                                                                                ##STR144##                                                                             2 CH.sub.3                                       608       CH.sub.2 CCH                                                                               ##STR145##                                                                             2 CH.sub.3                                       609       CH.sub.2 CF.sub.2 CF.sub.3                                                                CH.sub.2 C CH                                                                           2 CH.sub.3                                       610       CH.sub.2 CCH                                                                              CH.sub.2 CCH                                                                            2 CH.sub.3                                       611       CH.sub.3 CF.sub.2 CF.sub.3                                                                CH.sub.2 CF.sub.2 CF.sub.3                                                              2 CH.sub.3                                       612       H          H        1 CH.sub.3                                       613       CH.sub.3   H        1 CH.sub.3                                       614       C.sub.2 H.sub.5                                                                           H        1 CH.sub.3                                       615       CH.sub.2 CF.sub.3                                                                         H        1 CH.sub.3                                       616       CH.sub.2 CF.sub.2 CF.sub.3                                                                H        1 CH.sub.3                                       617       CH.sub.2 CH.sub.2 CH.sub.3                                                                H        1 CH.sub.3                                       618       CH.sub.2 CH.sub.2 CF.sub.3                                                                H        1 CH.sub.3                                       619       CH(CF.sub.3)CH.sub.3                                                                      H        1 CH.sub.3                                       620                                                                                       ##STR146##                                                                               H        1 CH.sub.3                                       621       (CH.sub.2).sub.3 CH.sub.3                                                                 H        1 CH.sub.3                                       622       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             H        1 CH.sub.3                                       623       CH.sub.2 CH(CH.sub.3).sub.2                                                               H        1 CH.sub.3                                       624       C(CH.sub.3).sub.3                                                                         H        1 CH.sub.3                                       625                                                                                       ##STR147##                                                                               H        1 CH.sub.3                                       626       H          CH.sub.3 1 CH.sub.3                                       627       CH.sub.3   CH.sub.3 1 CH.sub.3                                       628       C.sub.2 H.sub.5                                                                           CH.sub.3 1 CH.sub.3                                       629       CH.sub.2 CF.sub.3                                                                         CH.sub.3 1 CH.sub.3                                       630       CH.sub.2 CF.sub.2 CF.sub.3                                                                CH.sub.3 1 CH.sub.3                                       631       CH.sub.2 CH.sub.2 CH.sub.3                                                                CH.sub.3 1 CH.sub.3                                       632       CH.sub.2 CH.sub.2 CF.sub.3                                                                CH.sub.3 1 CH.sub.3                                       633       CH(CH.sub.3).sub.2                                                                        CH.sub.3 1 CH.sub.3                                       634       CH(CF.sub.3)CH.sub.3                                                                      CH.sub.3 1 CH.sub.3                                       635                                                                                       ##STR148##                                                                               CH.sub.3 1 CH.sub.3                                       636       (CH.sub.2).sub.3 CH.sub.3                                                                 CH.sub.3 1 CH.sub.3                                       637       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             CH.sub.3 1 CH.sub.3                                       638       CH.sub.2 CH(CH.sub.3).sub.2                                                               CH.sub.3 1 CH.sub.3                                       639       C(CH.sub.3).sub.3                                                                         CH.sub.3 1 CH.sub.3                                       640                                                                                       ##STR149##                                                                               CH.sub.3 1 CH.sub.3                                       641       H          H        0 CH.sub.3                                       642       CH.sub.3   H        0 CH.sub.3                                       643       C.sub. 2 H.sub.5                                                                          H        0 CH.sub.3                                       644       CH.sub.2 CF.sub.3                                                                         H        0 CH.sub.3                                       645       CH.sub.2 CF.sub.2 CF.sub.3                                                                H        0 CH.sub.3                                       646       CH.sub.2 CH.sub.2 CH.sub.3                                                                H        0 CH.sub.3                                       647       CH.sub.2 CH.sub.2 CF.sub.3                                                                H        0 CH.sub.3                                       648       CH(CF.sub.3)CH.sub.3                                                                      H        0 CH.sub.3                                       649                                                                                       ##STR150##                                                                               H        0 CH.sub.3                                       650       (CH.sub.2).sub.3 CH.sub.3                                                                 H        0 CH.sub.3                                       651       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             H        0 CH.sub.3                                       652       CH.sub.2 CH(CH.sub.3).sub.2                                                               H        0 CH.sub.3                                       653       C(CH.sub.3).sub.3                                                                         H        0 CH.sub.3                                       654                                                                                       ##STR151##                                                                               H        0 CH.sub.3                                       655       H          CH.sub.3 0 CH.sub.3                                       656       CH.sub.3   CH.sub.3 0 CH.sub.3                                       657       C.sub.2 H.sub.5                                                                           CH.sub.3 0 CH.sub.3                                       658       CH.sub.2 CF.sub.3                                                                         CH.sub.3 0 CH.sub.3                                       659       CH.sub.2 CF.sub.2 CF.sub.3                                                                CH.sub.3 0 CH.sub.3                                       660       CH.sub.2 CH.sub.2 CH.sub.3                                                                CH.sub.3 0 CH.sub.3                                       661       CH.sub. 2 CH.sub.2 CF.sub.3                                                               CH.sub.3 0 CH.sub.3                                       662       CH(CH.sub.3).sub.2                                                                        CH.sub.3 0 CH.sub.3                                       663       CH(CF.sub.3)CH.sub.3                                                                      CH.sub.3 0 CH.sub.3                                       664                                                                                       ##STR152##                                                                               CH.sub.3 0 CH.sub.3                                       665       (CH.sub.2).sub.3 CH.sub.3                                                                 CH.sub.3 0 CH.sub.3                                       666       CH(CH.sub.3)CH.sub.2 CH.sub.3                                                             CH.sub.3 0 CH.sub.3                                       667       CH.sub.2 CH(CH.sub.3).sub.2                                                               CH.sub.3 0 CH.sub.3                                       668       C(CH.sub.3).sub.3                                                                         CH.sub.3 0 CH.sub.3                                       669                                                                                       ##STR153##                                                                               CH.sub.3 0 CH.sub.3                                       __________________________________________________________________________

Compounds according to this invention fall into different structural types according to the particular nature of the group X in Formula (I) and the position of substitution of the groups R^(a) and R^(b) relative thereto. The selection of an appropriate synthetic process for the preparation of the compounds of the invention is dependent upon the particular structural type which it is desired to prepare. Compounds of formula (I) in which X is nitrogen and the groups R^(a) and R^(b) occupy the 6 and 2 positions respectively relative thereto may be described by Formula (IA): ##STR154## wherein R¹, R², R³ and n have any of the values given hereinbefore. Compounds of formula (I) in which X is nitrogen and the groups R^(a) and R^(b) occupy the 4 and 2 positions respectively relative thereto may be described by Formula (IB): ##STR155## Compounds of formula (I) in which X is carbon bearing a hydrogen atom and the groups R^(a) and R^(b) occupy 1 and 3 positions relative to each other may be described by Formula (IC): ##STR156## Compounds according to Formulae (IA) and (IB) for which the value of n is 2 may be prepared from the corresponding 2-pyridone precursor of formula (IIA) or (IIB): ##STR157## wherein R¹ and R² have any of the meanings given hereinbefore, by reaction of a sulphonyl halide of formula R³ SO₂ -Hal, wherein R³ has any of the meanings given hereinbefore and Hal represents halogen, for example chlorine, bromine or fluorine, optionally in the presence of a base, for example pyridine or a trialkylamine such as triethylamine, in an inert solvent such as dichloromethane.

The pyridones of formula (IIA) or (IIB) may be prepared from the corresponding 2-halopyridine of formula (IIIA) or (IIIB): ##STR158## wherein R¹ and R² have any of the meanings given hereinbefore and Hal is halogen, for example chlorine, bromine or fluorine, by a two stage process. Firstly, the halogen substituent is displaced by a benzyloxy group to give the corresponding 2-benzyloxypyridine of formula (IVA) or (IVB): ##STR159## Although an unsubstituted benzyloxy group is favoured for this reaction stage, any benzyl group having a simple ring substituent which is inert to the reaction conditions may also be employed. The displacement may be conveniently performed by reaction with benzyl alcohol in the presence of a base, for example sodium hydride, in an inert solvent such as tetrahydrofuran or dimethylformamide. Debenzylation of the compound of formula (IVA) or (IVB) then gives the corresponding 2-pyridone of formula (IIA) or (IIB). Debenzylation may be conveniently performed under acidic conditions, for example by heating the compound of formula (IVA) or (IVB) in the presence of a mixture of acetic acid and concentrated aqueous hydrobromic acid, or by heating the compound of formula (IVA) or (IVB) in the presence of trifluoroacetic acid in an inert solvent. Debenzylation may also be performed by hydrogenolysis, for example by catalytic hydrogenation.

The 2-pyridones of formula (IIA) and (IIB) may also be prepared from the corresponding 1-halopyridines of formula (IIIA) or (IIIB) directly by acid or base catalysed hydrolysis.

Those skilled in the art will recognise that the 2-pyridones of formula (IIA) and (IIB) exist in tautomeric equilibrium with the corresponding 2-hydroxypyridines.

The compounds of formula (IIIA) and (IIIB) may be prepared from 2,6- and 2,4-dihalopyridines respectively by the following sequence of processes. A 2,6-dihalopyridine, of formula (VA) or a 2,4-dihalopyridine of formula (VB): ##STR160## wherein Hal represents a halogen, for example chlorine, bromine or fluorine, is reacted with one molar equivalent of benzylthiol or a simple derivative thereof having a ring substituent which is inert to the reaction conditions, in the presence of a base, for example sodium hydride; the reaction may be carried out in any suitable inert solvent such as tetrahydrofuran and produces the corresponding 2-halo-6-benzylthiopyridine or a 2-halo-4-benzylthiopyridine of formula (VIA) or (VIB): ##STR161## wherein Hal represents a halogen, for example chlorine, bromine or fluorine, and Ph represents phenyl or a simple ring-substituted derivative thereof as described above. The specific 2-halo-4-benzyl substitution pattern of the compounds of formula (VIB) obtained by this process has been confirmed by spectrometric analysis. The compounds of formula (VIA) or (VIB) may then be subjected to oxidative debenzylation, for example by reaction with chlorine in the presence of water optionally in the presence of a solvent, to give the corresponding 2-halopyridine-6-sulphonyl chloride or 2-halopyridine-4-sulphonyl chloride of formula (VIIA) or (VIIB): ##STR162## The compound of formula (VIIA) or (VIIB) may then be reacted either with one equivalent of an amine of formula (R¹)(R²)NH in the presence of an acid scavenger, or with two equivalents of the amine of formula (R¹)(R²)NH, to give the desired compound of formula of formula (IIIA) or (IIIB).

These processes are summarised in Schemes I and II for the particular case of the preparation of compounds of formula (IA) wherein n is 2. The summary applies mutatis mutandis for the preparation of compounds of formula (IB). ##STR163##

Compounds of formula (IA) having a lower oxidation state (i.e. for which the value of n is 0 or 1) may be prepared from 2,6-dihydroxypyridine by the following sequence of processes. The dihydroxypyridine is reacted with two molar equivalents of a sulphonyl halide of formula R³ SO₂ -Hal, wherein R³ has any of the meanings given hereinbefore and Hal represents halogen, for example chlorine or bromine. The reaction may be carried out in the presence of a base such as pyridine or a trialkylamine, for example triethylamine or trimethylamine, in a suitable inert solvent such as dichloromethane, to give the corresponding 2,6-bis sulphonate of formula (VIIIA). Reaction of this product with one molar equivalent of benzenethiol or a simple derivative thereof in the presence of a base in an inert solvent then gives the corresponding compound of formula (IXA): ##STR164## Debenzylation of the compound of formula (IXA) by reaction with sulphuryl chloride in an inert solvent produces an intermediate sulphenyl chloride which may be reacted with an amine of formula (R¹)(R²)NH, wherein R¹ and R² have any of the meanings given hereinbefore, to give the corresponding product of formula (IA) for which n is 0. The corresponding compound of formula (IA) for which n is 1 may be obtained by controlled oxidation of this product, for example by reaction with meta-chloroperbenzoic acid. These processes are summarised in Scheme III. ##STR165##

Compounds of formula (IC) wherein R¹, R² and R³ have any of the meanings given hereinbefore and wherein n is 2 may be prepared from 3-benzoyloxybenzenesulphonyl chloride by the following sequence of processes. 3-benzoyloxybenzenesulphonyl chloride may be reacted with an amine of formula (R¹)(R²)NH, either in the presence of an acid scavenger, for example pyridine or a trialkylamine such as triethylamine, or in the presence of excess of the amine of formula (R¹)(R²)NH, to give the corresponding compound of formula (X): ##STR166## Basic hydrolysis of the compound of formula (X), for example by reaction with an alkali metal hydroxide such as sodium hydroxide in a suitable solvent such as tetrahydrofuran gives the corresponding 3-hydroxybenzenesulphonamide of formula (XI): ##STR167## which may be reacted with a sulphonyl halide of formula R³ SO₂ -Hal, wherein R³ has any of the meanings given hereinbefore and Hal is a halogen atom, for example chlorine or bromine, to give the desired compound of formula (IC). These processes are summarised in Scheme IV. The preparation of 3-benzoyloxybenzenesulphonyl chloride is described in by Kato et al in The Journal of Pesticide Science, Volume 13, pp 107-115 (1988). ##STR168##

Individual variants of the general processes described herein may be necessary in specific cases where the nature of the substituents may give rise to the possibility of competing reactions. By way of example, a specific variant of the processes described, particularly suitable for the preparation of compounds of formula (I) wherein R³ is ethenyl is summarised in Scheme V. Other variants of the general processes described herein are described in the Examples. ##STR169##

All of the processes described herein may be carried out using alternative solvents or diluents and may be accelerated or lead to higher yields of product when performed at elevated temperatures or in the presence of appropriate catalysts. Further details of many of the processes described herein may be found in the Examples.

Many of the intermediates described herein are believed to be novel. In a further aspect, therefore, the invention provides the following:

a compound of formula (II): ##STR170## wherein R¹ and R² have any of the values given hereinbefore and the group (R¹)(R²)NSO₂ is in the 4 or the 6 position relative to the ring nitrogen atom;

a compound of formula (III): ##STR171## wherein Hal is a halogen atom, and R¹ and R² have any of the values given hereinbefore, and the group (R¹)(R²)NSO₂ is in the 4 or the 6 position relative to the ring nitrogen atom;

a compound of formula (IV): ##STR172## wherein R¹ and R² have any of the values given hereinbefore and the group (R¹)(R²)NSO₂ is in the 4 or the 6 position relative to the ring nitrogen atom;

a compound of formula (X): ##STR173## wherein R¹ and R² have any of the values given hereinbefore; and

a compound of formula (XI): ##STR174## wherein R¹ and R² have any of the values given hereinbefore.

The compounds of formula (I) may be used to combat and control infestations of insect pests. The insect pests which may be combated and controlled by the use of the invention compounds include those pests associated with agriculture (which term includes the growing of crops for food and fibre products, horticulture and animal husbandry), forestry, the storage of products of vegetable origin, such as fruit grain and timber, and also those pests associated with the transmission of diseases of man and animals.

In order to apply the compounds to the locus of the pests they are usually formulated into compositions which include in addition to the insecticidally active ingredient or ingredients of formula (I) suitable inert diluent or carrier materials, and/or surface active agents.

The compounds of the invention may be the sole active ingredient of the composition or they may be admixed with one or more additional active ingredients such as insecticides, insecticide synergists, herbicides, fungicides or plant growth regulators where appropriate.

Suitable additional active ingredients for inclusion in admixture with the compounds of the invention may be compounds which will broaden the spectrum of activity of the compounds of the invention or increase their persistence in the location of the pest. They may synergise the activity of the compounds of the invention or complement the activity, for example by increasing the speed of effect, improving kill or knockdown of target insect pests, or overcoming repellency. Additionally, multi-component mixtures of this type may help to overcome or prevent the development of resistance to individual components.

The particular insecticide, herbicide or fungicide included in the mixture will depend upon its intended utility and the type of complementary action required. Examples of suitable insecticides include the following:

(a) natural pyrethrins or pyrethroids such as permethrin, fenvalerate, deltamethrin, cyhalothrin, biphenthrin, fenpropathrin, cyfluthrin, tefluthrin, empenthrin, ethofenprox, tetramethrin, bioallethrin, fenfluthrin, prallethrin, 5-benzyl-3-furylmethyl (E)-(1R,3S)-2,2-dimethyl-3-(2-oxothiolan-3-ylidenemethyl)cyclopropane carboxylate and pentafluorobenzyl (cis)-3-[2-fluoro-2-(methoxycarbonyl)ethenyl]-2,2-dimethylcyclopropane carboxylate;

(b) organophosphates such as profenofos, sulprofos, dichlorvos, methyl parathion, azinphos-methyl, demeton-s-methyl, heptenophos, thiometon, fenamiphos, monocrotophos, triazophos, methamidophos, dimethoate, phosphamidon, malathion, chlorpyrifos, phosalone, fensulphothion, fonofos, phorate, phoxim, pyrimiphos-methyl, fenitrothion and diazinon;

(c) carbamates (including aryl carbamates) such as pirimicarb, cloethocarb, carbofuran, ethiofencarb, aldicarb, thiofurox, carbosulfan, bendiocarb, fenobucarb, propoxur and oxamyl;

(d) benzoyl ureas such as triflumuron and chlorofluazuron;

(e) organic tin compounds such as cyhexatin, fenbutatin oxide and azocyclotin;

(f) macrolides such as avermectins or milbemycins, for example abamectin, avermectin and milbemycin;

(g) hormones and synthetic mimics thereof such as juvenile hormone, juvabione, ecdysones, methoprene and hydroprene;

(h) pheromones;

(i) organochlorine compounds such as benzene hexachloride, DDT, chlordane, dieldrin and endosulfan.

In addition to the major chemical classes of insecticide listed above, other insecticides having particular targets may be employed in the mixture if appropriate for the intended utility of the mixture. For instance selective insecticides for particular crops, for example stem borer specific insecticides for use in rice such as cartap or buprofezin, can be employed. Alternatively, insecticides or acaricides specific for the control of specific insect growth stages, for example ovolarvicides such as clofentezine, amitraz, chlordimeform, flubenzimine, hexythiazox and tetradifon; motilicides such as dicofol or propargite; adulticides such as bromopropylate, chlorobenzilate; or insect growth regulators such as hydramethylnon, cyromazine, methoprene, chlorfluazuron and diflubenzuron may also be included in the compositions.

Examples of suitable insecticide synergists for use in the compositions include piperonyl butoxide, sesamex and dodecyl imidazole.

Suitable herbicides, fungicides and plant growth regulators for inclusion in the compositions will depend upon the intended target and the effect required. An example of a rice-selective herbicide which can be included is propanil; an example of a plant growth regulator for use in cotton is "Pix"; and examples of fungicides for use in rice include blasticides such as blasticidin-S. The choice of other ingredients to be used in admixture with the active ingredient will often be within the normal skill of the formulator, and will be made from known alternatives depending upon the total effect to be achieved.

The ratio of the compound of the invention to any other active ingredient in the composition will depend upon a number of factors including the type of insect pest to be controlled, and the effects required of the mixture. However, in general, the additional active ingredient of the composition will be applied at about the rate at which it would be applied on its own, or at a lower rate if synergy occurs.

The compositions may be in the form of dusting powders wherein the active ingredient is mixed with a solid diluent or carrier, for example kaolin, bentonite, kieselguhr or talc, or they may be in the form of granules wherein the active ingredient is absorbed in a porous granular material, for example pumice.

Alternatively, the compositions may be in the form of liquid preparations to be used as dips, sprays or aerosols. Dips and sprays are generally aqueous dispersions or emulsions of the active ingredient in the presence of one or more known wetting agents (surface active agents). Aerosol compositions may contain the active ingredient or ingredients, a propellant and an inert diluent, for example odouless kerosene or alkylated benzenes. In a preferred form, aerosol compositions may contain from 0.005% to 4% of active ingredient or ingredients, the remainder of the composition comprising a solvent, selected from odorless kerosene and alkylated benzenes, and a propellant. Aerosol compositions may optionally incorporate other additives, for example perfumes or corrosion inhibitors.

Wetting agents, dispersing agents and emulsifying agents may be of the cationic, anionic or non-ionic type. Suitable agents of the cationic type include, for example, quaternary ammonium compounds, for example cetyltrimethylammonium bromide. Suitable agents of the anionic type include, for example, soaps, salts of aliphatic monoesters of sulphuric acid, for example sodium lauryl sulphate, salts of sulphonated aromatic compounds, for example sodium dodecylbenzenesulphonate, sodium lignosulphonate, calcium lignosulphonate, ammonium lignosulphonate, butylnaphthalenesulphonate and a mixture of the sodium salts of diisopropyl- and triisopropyl naphthalenesulphonates. Suitable agents of the non-ionic tyoe include, for example, the condensation products of ethylene oxide with fatty alcohols such as oleyl alcohol or cetyl alcohol, or with alkyl phenols such as octyl phenol, nonyl phenol and octyl cresol. Other non-ionic agents are the partial esters derived from long chain fatty acids and hexitol anhydrides, the condensation products of the said partial esters with ethylene oxide, and the lecithins.

The compositions may be prepared by dissolving the active ingredient in a sutiable solvent, for example a ketonic solvent such as diacetone alcohol, or an aromatic solvent such as trimethylbenzene, and optionally adding the mixture so obtained to water which may contain one or more known wetting, dispersing or emulsifying agents.

Other suitable organic solvents are dimethylformamide, ethylene dichloride, isopropyl alcohol, propylene glycol and other glycols, diacetone alcohol, toluene, kerosene, white oil, methylnaphthalene, xylenes, trichloroethylene, N-methyl-2-pyrollidone and tetrahydrofurfuryl alcohol (THFA).

The compositions which are to be used in the form of aqueous dispersions or emulsions are generally supplied in the form of a concentrate containing a high proportion of the active ingredient or ingredients, the said concentrate to be diluted with water before use. These concentrates are often required to withstand storage for prolonged periods and, after such storage, to be capable of dilution with water to form aqueous preparations which remain homogeneous for a sufficient time to enable them to be applied by conventional spray equipment. The concentrates may contain 1-99% by weight of the active ingredient or ingredients. When diluted to form aqueous preparations, such preparations may contain varying amounts of the active ingredient depending upon the purpose for which they are to be used. For agricultural or horticultural purposes, an aqueous preparation containing between 0.0001% and 0.1% by weight of the active ingredient or ingredients is particularly useful. In use, the compositions are applied to the pests, to the locus of the pests, to the habitat of the pests, or to growing plants liable to infestation by the pests, by any of the known means of applying pesticidal compositions, for example by dusting or spraying or in a granular formulation.

The compounds of formula (I) and compositions comprising them are very toxic to a variety of insect, and other invertebrate pests, including, for example, the following:

Myzus persicae (aphid)

Aphis gossypii (aphid)

Aphis fabae (aphid)

Megoura viceae (aphid)

Plutella maculipennis (diamond back moth)

Spodoptera littoralis (cotton leafworm)

Heliothis virescens (tobacco budworm)

Diabrotica spp. (rootworms)

Agrotis spp. (cutworms)

Chilo partellus (maize stem borer)

Nilaparvata lugens (planthopper)

Nephotettix cincticeps (leafhopper)

The compounds of formula (I) are particularly effective for the control pests of hopper pests such as planthoppers (Delphacidae), for example Nilaparvata spp., and leafhoppers (Cicadellidae), for example Nephotettix spp. They are also effective against soil pests such as Diabrotica spp. and sucking pests such as aphids, for example Myzus spp., Aphis spp. or Megoura spp. The compounds are characterised by a particularly high level of systemic activity.

The following Examples illustrate various aspects of this invention. In the preparation Examples the products were usually identified and characterised by means of nuclear magnetic resonance (NMR) spectroscopy and infra red (IR) spectroscopy. In each case where a product is specifically named its spectral characteristics are consistent with the assigned structure.

In the Examples, gas liquid chromatography (GLC) retention times were determined on a Hewlett Packard 5890 Gas Chromatograph, using a Chrompak C.P. Sil 5 C.B. column of 12.5 m length and 0.2 mm internal diameter. Unless otherwise stated, the injection temperature was 100° C., and a temperature gradient of 15° C. per minute employed, up to a maximum temperature of 280° C., maintained for 4 minutes. The carrier gas was helium at a column head pressure maintained at 11 psi. Alternative injection and maximum temperatures are indicated in the Examples where appropriate.

¹ H NMR spectrometry was performed at a frequency of 270 MHz on a Jeol FX 270 NMR spectrometry unless otherwise indicated. 90 Mhz, 60 Mhz and 400 MHz ¹ H NMR spectrometry were performed using Jeol FX 90Q, Jeol PMX 60 SI and Jeol GX 400 spectrometers. ¹⁹ F NMR spectrometry was performed using a Jeol FX 90Q spectrometer at a frequency of 84.26 MHz. All NMR shift values ( ) are quoted in ppm relative to a standard (TMS or CFCl₃). In the NMR data, the following abbreviations are used: s=singlet, d=doublet, t=triplet, q=quartet, dd=double doublet, m=multiplet, b=broad.

Molecular ion (M⁺) peaks were determined on one of three mass spectrometers: Jeol DX 303, Kratos MS 80 or Hewlett Packard HP 5992.

EXAMPLE 1

This Example illustrates the stages in the preparation of 2-[N-(prop-2-yl)sulphamoyl]-6-(methanesulphonyloxy)pyridine (compound No. 1)

(i) 2-benzylthio-6-fluoropyridine.

A solution of benzylthiol (5.4 g) in tetrahydrofuran (25 cm³) was added dropwise to a stirred suspension of sodium hydride (1.9 g of a 55% of a dispersion in oil) in tetrahydrofuran (350 cm³) under a nitrogen atmosphere. The mixture was stirred for 30 minutes and a solution of 2,6-difluoropyridine (5 g) in tetrahydrofuran (25 cm³) was added dropwise. The mixture was stirred for a further 3 hours and then carefully quenched with water. The products were extracted into diethyl ether and the combined ether extracts were washed with water and brine solution, then dried over anhydrous magnesium sulphate, filtered and concentrated by evaporation under reduced pressure. The residual dark liquid was purified by chromatography on a silica gel support, eluting with hexane containing 5% by volume ethyl acetate. Fractions containing 15-20 cm³ of eluent were collected separately during the elution, the product being collected in fractions 11 to 19. Evaporation of the eluent gave the title product (7.1 g) as a clear liquid.

¹ H NMR (CDCl₃): 4.40 (2H,s); 6.57 (1H,dd); 7.02 (1H,dd); 7.2-7.6 (6H,m).

(ii) 6-fluoropyridine-2-sulphonyl chloride.

Chlorine gas was bubbled through a vigorously stirred mixture of chloroform (20 cm³), water (20 cm³) and 2-benzylthio-6-fluoropyridine (1 g) for a total of 95 minutes. Aqueous sodium metabisulphite solution was added to the mixture and the chloroform layer was separated. The aqueous layer was extracted with further chloroform and the combined chloroform layers were washed with water, dried over anhydrous magnesium sulphate, filtered and concentrated by evaporation under reduced pressure to yield a residual oil (2.0 g) which was used without further purification.

(iii) 2-[N-(prop-2-yl)sulphamoyl]-6-fluoropyridine.

A mixture of 6-fluoropyridine-2-sulphonyl chloride (in the form of the oil obtained in Example 2; 1.0 g) 2-aminopropane (0.6 g, 2 equivalents) and

chloroform (10 cm³) was stirred for 1 hour, then poured into water. The organic layer was separated, dried over anhydrous magnesium sulphate and concentrated by evaporation under reduced pressure to give a green liquid which crystallised on standing. Purification by chromatography on a silica gel support, eluting with hexane containing 30% by volume ethyl acetate gave the title product (0.385 g) as a light brown solid which could be further purified by recrystallisation from a hexane/ethyl acetate mixture.

Melting Point: 105°-105.7° C.

¹ H NMR (CDCl₃): 1.16 (6H,d); ca3.6 (1H,m), ca4.8 (1H,bd); 7.15 (1H,m); 6.9-7.2 (2H,m)

(iv) 2-[N-(prop-2-yl)sulphamoyl]-6-(benzlyoxy)pyridine.

A solution of benzyl alcohol (0.141 g) in tetrahydrofuran (5 cm³) was added dropwise to a stirred suspension of sodium hydride (0.57 g of a 55% suspension in oil) in tetrahydrofuran (20 cm³). The mixture was stirred for 30 minutes and a solution of 2-[N-(prop-2-yl)]-6-fluoropyridine (0.285 g) was added dropwise at the ambient temperature (ca 22° C.). The mixture was stirred for 2 hours at the ambient temperature after which time analysis by thin layer chromatography showed no reaction. The mixture was heated to 60° C. and stirring continued for a further 75 minutes. No reaction was detected, and further

15 tetrahydrofuran (15 cm³) and sodium hydride (0.5 g of a 55% dispersion in oil) were added and stirring continued at 60° C. for a further 90 minutes*. The mixture was then allowed to cool to the ambient temperature and was allowed to stand overnight. The mixture was poured onto water and extracted twice with diethyl ether. The combined organic layers were washed with water and the washings extracted with further diethyl ether. The combined organic layers were dried over anhydrous magnesium sulphate, filtered and concentrated by evaporation of the solvent under reduced pressure to leave a clear brown liquid which was purified by column chromatography on a silica gel support, eluting with hexane containing 20% ethyl acetate to give the title product (0.26 g) as a crystalline solid which could be further purified by recrystallisation from a hexane/ethyl acetate mixture.

Melting Point: 105.5°-107° C.

400 MHz ¹ H NMR (CDCl₃): 1.0 (6H,d); 3.5 (1H,m); 4.55 (1H,bd); 5.42 (2H,s); 6.98 (1H,d); 7.3-7.5 (5H,m); 7.6 (1H,d); 7.75 (1H,dd)

(v) 2-[N-(prop-2-yl)sulphamoyl]pyrid-6-one.

A mixture of 2-[N-(prop-2-yl)sulphamoyl]-6-(benzyloxy)pyridine (0.11 g), 48% aqueous hydrobromic acid solution (1 cm³) and glacial acetic acid (1 cm³) was heated at the reflux temperature for 30 minutes. The mixture was allowed to cool then partitioned between a mixture of water and dichloromethane. The organic layer was separated and the aqueous layer extracted twice with further dichloromethane. The combined organic layers were washed with water and brine, dried over anhydrous magnesium sulphate, filtered and concentrated by evaporation of the solvent under reduced pressure to give a pale yellow oil which was purified by column chromatography on a silica gel support, eluting with hexane to remove impurities and further eluting with ethyl acetate to give the title product as a yellow oil (0.052 g).

400 MHz ¹ H NMR (CDCl₃): 1.15 (6H,d); 3.5 (1H,m); 6.1 (1H,bd); 6.82 (1H,d); 7.09 (1H,d); 7.65 (1H,dd).

(vi) 2-[N-(prop-2-yl)sulphamoyl]-6-(methanesulphonyloxy)pyridine (compound No 1)

2-[(N-prop-2-yl)sulphamoyl]pyrid-6-one (0.052 g) was dissolved in dichloromethane (4 cm³). Methane sulphonylchloride (0.027 g) was added dropwise in dichloromethane (1 cm³) and the reaction mixture was stirred for 45 minutes. Triethylamine (0.024 g) in dichloromethane (1 cm³) was added dropwise and the reaction mixture was stirred for 2 hours. The mixture was left overnight and then refluxed for 2 hours. The cooled reaction mixture was poured into water and the product extracted into dichloromethane twice. The dichloromethane extracts were combined, dried, and evaporated under reduced pressure to leave the crude product.

The crude reaction product was purified by column chromatography on a silica gel support, eluting with hexane containing 30% by volume ethyl acetate to give the title product as a white solid (0.07 g).

¹ H NMR (CDCl₃): 1.14 (6H,d); 3.55 (3H,s); 3.6 (1H,m); 4.75 (1H,bd); 7.3 (1H,d); 8.0 (2H,m)

Examples 2-49 illustrate the preparation of further examples according to the invention using essentially the same procedures as those described in stages (i)-(vi) of Example 1. In each example, characteristic data are given for final products and for intermediates which have not been described in earlier examples. In some cases, intermediates were not isolated, or were used without purification, and no data were recorded. Individual reaction conditions employed may have differed from those described in Example 1 according to requirements for optimisation of the reaction. Such requirements were determined by monitoring of the reaction by gas or thin layer chromatography and the optimisation techniques which were employed were within the normal skill of the chemist. Intermediates are identified by name and by the reaction stage number [(i)-(vi)] corresponding to the method of their preparation by reference to Example 1. Where alternative processes were used, these are fully described in the Example.

EXAMPLE 2

2-[N-methyl-N-(prop-2-yl)sulphamoyl]-6-(methanesulphonyloxy)pyridine (compound No. 2).

Melting Point: 69.4°-70.7° C.

¹ H NMR (CDCl₃): 1.04 (6H,d); 2.91 (3H,s); 3.57 (3H,s); 4.23 (1H,m); 7.26 (1H,d); 7.9 (1H,d); 8.03 (1H, t).

(iii) 2-[N-methyl-N-(prop-2-yl)sulphamoyl]-6-fluoropyridine.

¹ H NMR (CDCl₃): 1.12 (6H,d); 2.88 (3H,s); 4.30 (1H,m); 7.1 (1H,d); 7.84 (1H,d); 7.98 (1H,q).

(iv) 2-[N-methyl-N-(prop-2-yl)sulphamoyl]-6-(benzyloxy)pyridine.

¹ H (CDCl₃): 1.0 (6H,d); 2.84 (3H,s); 4.26 (1H,m); 5.42 (2H,s); 6.97 (1H,d); 7.3-7.5 (5H,m); 7.58 (1H,d); 7.75 (1H,dd).

(v) 2-[N-methyl-N-(prop-2-yl)-sulphamoyl]-pyrid-6-one.

EXAMPLE 3

2-[N-cyclopropylsulphamoyl]-6-(methanesulphonyloxy)pyridine (compound No. 3).

¹ H NMR (CDCl₃) 0.68 (4H,m); 2.42 (1H,m); 3.55 (3H,s); 5.22 (1H,bs); 7.3 (1H,d); 8.05 (2H,m).

(iii) 2-[N-cyclopropyl sulphamoyl ]-6-fluoropyridine

¹ H NMR (CDCl₃): 0.7 (4H,m); 2.36 (1H,m); 5.4 (1H,bs); 7.18 (1H,dd); 8.00 (1H,dd); 8.05 (1H,dd)

(iv) 2-[N-cyclopropylsulphamoyl]-6-(benzyloxy)pyridine.

¹ H NMR (CDCl₃): 0.55 (4H,m); 2.08 (1H,m); 5.07 (1H,bs); 5.42 (2H,s); 7.01 (1H,d); 7.40 (5H,m); 7.65 (1H,d); 7.8 (1H,t).

(v) 2-[N-cyclopropylsulphamoyl]-pyrid-6-one.

¹ H NMR (CDCl₃): 0.65 (4H,m); 2.35 (1H,m); 6.40 (1H,bs); 6.85 (1H,d); 7.18 (1H,d); 7.68 (1H,t).

EXAMPLE 4

2-[N-(prop-2-yl)-N-methylsulphamoyl]-6-(4-methylbenzenesulphonyloxy)pyridine (compound No 4).

¹ H NMR (CDCl₃): 1.00 (6H,d); 2.45 (3H,s); 2.75 (3H,s); 4.12 (1H,m); 7.24 (1H,d); 7.4 (2H,d); 7.8 (1H,d); 7.95 (2H,d).

EXAMPLE 5

2-[N-(1,1,1-trifluoroethyl)sulphamoyl]-6-(methanesulphonyloxy)pyridine (compound No 5).

¹ H NMR (CDCl₃): 3.15 (1H,bs); 3.60 (3H,s); 3.75 (2H,q); 7.38 (1H,d); 7.95 (1H,d); 8.16 (1H,dd).

EXAMPLE 6

2-[N-acetylsulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No 6).

¹ H NMR (CDCl₃): 2.05 (3H,s); 3.4 (3H,s); 7.28 (1H,dd); 8.05 (2H,m).

(iii) (Alternative process): 6-fluoro-2-sulphamoylpyridine.

A solution of 6-fluoropyridine-2-sulphonyl chloride (1.2 g) in diethyl ether (100 cm³) was cooled to -60° C. and ammonia was slowly bubbled though the stirred solution. Further 6-fluoropyridine-2-sulphonyl chloride (1 g) was added and the introduction of ammonia continued. The reaction mixture was warmed to the ambient temperature and poured into water, and the product extracted into diethyl ether. The aqueous layer was neutralised with dilute aqueous hydrochloric acid solution and then further extracted with diethyl ether. The combined diethyl ether washings were dried over anhydrous magnesium sulphate, filtered and evaporated to leave the title product.

¹ H NMR (DMSO): 7.02 (2H,bs); 7.18 (1H,dd); 7.90 (1H,dd); 8.09 (1H,dd).

(iv) 2-(N-acetylsulphamoyl)-6-benzyloxy-pyridine. 2-Sulphamoyl-6-benzyloxypyridine was prepared using the process of Example 1 (iv):

¹ H NMR (CDCl₃): 4.80 (2H,bs); 5.40 (2H,s); 7.00 (1H,d); 7.40 (5H,m); 7.60 (1H,d); 7.75 (1H,dd).

This compound was then acetylated using the following procedure:

To 2-[sulphamoyl]-6-benzyloxypyridine (1 g) in solution in dichloromethane (2 cm³) was added acetic anhydride (0.390 g) and 2 drops of concentrated sulphuric acid. The reaction mixture was stirred at the ambient temperature and acetic acid (2 cm³) added. The reaction mixture was heated at the reflux temperature for 2 hours, cooled, and added to water. The product was extracted into ethyl acetate. The combined organic layers were dried over anhydrous nesium sulphate and the solvent evaporated under reduced pressure. The product was purified by silica chromatography eluting with hexane containing a progressively increasing proportion of ethyl acetate (10-60% by volume).

¹ H NMR (CDCl₃): 2.14 (3H,s); 5.39 (2H,s); 7.06 (1H,d); 7.40 (5H,m); 7.80 (2H,m); 8.35 (1H,bs).

(v) 2-(N-acetylsulphamoyl)pyrid-6-one

¹ H NMR (CDCl₃): 2.05 (3H,s); 6.89 (1H,d); 7.4 (1H,s); 7.58 (1H,d); 7.75 (1H,t).

EXAMPLE 7

2-[N-(1-methylhexyl)sulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No. 7).

¹ H NMR (CDCl₃): 0.85 (3H,t); 1.08 (3H,d); 1.2 (4H,m); 1.45 (2H,m); 3.42 (1H,m); 3.55 (3H,s); 4.68 (1H,d); 7.30 (1H,d); 7.98 (1H,d); 8.05 (1H,t).

EXAMPLE 8

2-[N-methoxy-N-methylsulphamoyl]-6-(methanesulphonyloxy)pyridine. (Compound No 8).

¹ H NMR (CDCl₃): 3.10 (3H,s); 3.60 (3H,s); 3.80 (3H,s); 7.36 (1H,d); 8.00 (1H,d); 8.10 (1H,t).

(iii) Alternative Process: 2-[N-methoxy-N-methylsulphamoyl]-6-fluoropyridine.

A solution of 6-fluoropyridine-2-sulphonylchloride (1.96 g) and methoxylamine hydrochloride (1.96 g) in chloroform (40 cm³) was cooled to -78° C. under an atmosphere of nitrogen and a solution of triethylamine (2.03 g) in chloroform (10 cm³) was added with stirring. The reaction mixture was added to water and the product extracted into chloroform. The combined organic layers were dried over magnesium sulphate, filtered and evaporated to give the title product.

(iv) 2-(N-methoxy-N-methylsulphamoyl)-6-benzyloxypyridine

(vi) 2-[N-methoxy-N-methylsulphamoyl]pyrid-6-one.

¹ H NMR (CDCl₃): 2.98 (3H,s); 3.81 (3H,s); 6.95 (1H,d); 7.09 (1H,d); 7.68 (1H,dd); 8.0 (1H,bs).

EXAMPLE 9

2-[N-(2-methoxyethyl)sulphamoyl]-6-(methanesulphonyloxy)pyridine. (Compound No 9).

¹ H NMR (CDCl₃): 3.26 (3H,s); 3.31 (2H,t); 3.42 (2H,t); 3.53 (3H,s); 5.15 (1H,bt); 7.30 (1H,d); 7.92 (1H,d); 8.10 (1H,t).

(iii) 2-[N-(2-methoxyethyl)sulphamoyl]-6-fluoropyridine.

¹ H NMR (CDCl₃): 3.30 (3H,s); 3.32 (2H,t); 3.48 (2H,t); 7.15 (1H,dd); 7.90 (1H,dd); 8.02 (1H,dd).

(iv) 2-[N-(2-methoxyethyl)sulphamoyl]-6-benzyloxypyridine.

¹ H NMR (CDCl₃): 3.2 (5H,m); 3.4 (2H,t); 6.55 (1H,t); 6.85 (1H,d); 7.08 (1H,d); 7.62 (1H,dd).

(v) 2-[N-(2-methyloxyethyl)sulphamoyl]pyrid-6-one.

EXAMPLE 10

2-(N-phenylsulphamoyl)-6-(methanesulphonyloxy)pyridine (Compound No 10).

¹ H NMR (CDCl₃) 3.40 (3H,s); 6.95 (1H, bs); 7.1-7.30 (6H,m); 7.83 (1H,d); 7.95 (1H,t).

(iii) 2-(N-phenylsulphamoyl)-6-fluoropyridine.

¹ H NMR (CDCl₃); 3.68 (1H,bs); 7.1-7.3 (6H,m); 7 80 (1H,dd); 7.92 (1H,dd).

(iv) 2-(N-phenylsulphamoyl)-6-benzyloxypyridine.

¹ H NMR (CDCl₃): 5.35 (2H,s); 6.90 (4H,m); 7.05-7.5 (9H,m); 7.65 (1H,t).

(v) 2-(N-phenylsulphamoyl)pyrid-6-one.

¹ H NMR (CDCl₃): 6.85 (1H,d); 6.95 (1H,d); 7.1-7.3 (5H,m); 7.55 (1H,dd).

EXAMPLE 11

2-[N-(1-methylpropyl)sulphamoyl]-6-sulphonyloxy)pyridine. (Compound No. 11).

¹ H NMR (CDCl₃): 0.85 (3H,t); 1.1 (3H,d); 1.48 (2H,m); 3.4 (1H,m); 3.56 (3H,s); 4.55 (1H,bd); 7.30 (1H,d); 8.02 (2H,m).

(iii) 2-[N-(1-methylpropyl)sulphamoyl]-6-fluoropyridine.

¹ H NMR (CDCl₃): 0.85 (3H,t); 1.10 (3H,d); 1.48 (2H,m); 3.40 (1H,m); 4.75 (1H,bs); 7.15 (1H,dd); 7.90 (1H,dd); 8.04 (1H,dd).

(iv) 2-[N-(1-methylpropyl)sulphamoyl]-6-benzyloxypyridine.

¹ H NMR (CDCl₃): 0.8 (3H,t); 0.95 (3H,d); 1.38 (2H,m); 3.30 (1H,m); 4.42 (1H,bd); 5.40 (2H,s); 6.95 (1H,d); 7.30-7.45 (5H,m); 7.60 (1H,d); 7.75 (1H,t).

(v) 2-[N-(1-methylpropyl) sulphamoyl]pyrid-6-one.

¹ H NMR (CDCl₃): 0.85 (3H,t); 1.10 (3H,d); 1.48 (2H,m); 3.34 (1H,m); 6.02 (1H,bd); 6.80 (1H,d); 7.08 (1H,d); 7.60 (1H,t).

EXAMPLE 12

2-[N-(1-methylpropyl)sulphamoyl]-6-(ethane sulphonyloxy)pyridine (Compound No 12).

¹ H NMR (CDCl₃): 0.85 (3H,t); 1.10 (3H,d); 1.45 (2H,m); 1.60 (3H,t); 3.40 (1H,m); 3.70 (2H,q); 4.56 (1H,bd); 7.32 (1H,dd); 8.0 (2H,m).

EXAMPLE 13

2-[N-(prop-2-yl)sulphamoyl]-6-(trifluoromethanesulphonyloxy)pyridine (Compound No 13).

¹ H NMR (CDCl₃): 1.18 (6H,d); 3.65 (1H,m); 4.68 (1H,bd); 7.38 (1H,dd); 8.11 (2H,m).

EXAMPLE 14

2-[N-(prop-2-yl)sulphamoyl]-6-(ethanesulphonyloxy)pyridine (Compound No. 14).

¹ H NMR (CDCl₃): 1.12 (6H,d); 1.60 (3H,t); 3.58 (1H,m); 3.70 (2H,q); 4.82 (1H,bs); 7.31 (1H,d); 7.99 (1H,d); 8.04 (1H,t).

EXAMPLE 15

2-[N-methyl-N-(prop-2-yl)sulphamoyl]-6-(ethanesulphonyloxy)pyridine (Compound No 15).

¹ H NMR (CDCl₃): 0.95 (6H,d); 1.48 (3H,t); 2.80 (3H,s); 3.65 (2H,q); 4.12 (1H,m); 7.20 (1H,d); 7.80 (1H,d); 7.99 (1H,t).

EXAMPLE 16

2-[N-methyl-N-(prop-2-yl)sulphamoyl]-6-(trifluoromethanesulphonyloxy)pyridine. (Compound No. 16).

¹ H NMR (CDCl₃): 1.10 (6H,d); 2.94 (3H,s); 4.22 (1H,m); 7.35 (1H,dd); 8.08 (2H,m).

EXAMPLE 17

2-[N-(prop-2-yl)sulphamoyl]-6-(2,2,2trifluoroethanesulphonyloxy)pyridine (Compound No.17).

¹ H NMR (CDCl₃): 1.10 (6H,d); 3.58 (1H,m); 4.62 (2H,q); 5.1 (1H,bd); 7.32 (1H,d); 8.05 (2H,m).

EXAMPLE 18

2-[N-(prop-2-yl)sulphamoyl]-6-(benzenesulphonyloxy)pyridine (Compound No. 18).

¹ H NMR (CDCl₃): 1.15 (6H,d); 3.58 (1H,m); 4.76 (1H,bd); 7.40 (1H,d); 7.70-7.90 (3H,m); 8.05 (1H,m); 8.15 (1H,m); 8.20 (2H,d).

EXAMPLE 19

2-[N-(prop-2-yl)sulphamoyl]-6-(2-phenyl)ethanesulphonyloxy] pyridine (Compound No 19).

¹ H NMR (CDCl₃): 1.08 (6H,d); 3.32 (2H,m); 3.58 (1H,m); 3.95 (2H,m); 4.6 (1H,bd); 7.2-7.4 (6H,m); 8.0 (2H,m).

EXAMPLE 20

2-[N-(prop-2-yl)sulphamoyl]-6-(propanesulphonyloxy)pyridine (Compound No 20).

¹ H NMR (CDCl₃): 1.15 (9H,m); 2.05 (2H,m); 3.60 (1H,m); 3.68 (2H,m); 4.85 (1H,d); 7.30 (1H,d); 8.04 (2H,m).

EXAMPLE 21

10 2-[N-(prop-2-yl)sulphamoyl]-6-(perfluorohexanesulphonyloxy)pyridine (Compound No. 21).

¹ H NMR (CDCl₃): 1.17 (6H,d); 3.65 (1H,m); 4.7 (1H,bd); 7.38 (1H,dd); 8.12 (2H,m).

EXAMPLE 22

2[N-(Prop-2-yl)sulphamoyl]-6-butanesulphonyloxy)pyridine (Compound No. 22).

¹ H NMR (CDCl₃): 1.00 (3H,t); 1.15 (6H,d); 1.55 (2H,m); 2.00 (2H,m); 3.60 (1H, m); 3.68 (2H,m); 4.68 (1H,bd); 7.30 (1H,d); 8.02 (2H,m).

EXAMPLE 23

2-[N-(Prop-2-yl)sulphamoyl]-6-[4-(trifluoromethyl)benzenesulphonyloxy]pyridine (Compound No. 23).

¹ H NMR (CDCl₃): 1.0 (6H,d); 3.48 (1H,m); 4.4 (1H,bd); 7.29 (1H,d); 7.9 (4H,dd); 0.04 (1H,t); 8.30 (1H,d).

EXAMPLE 24

2-[N-(prop-2-yl)-sulphamoyl]-6-[4-methoxybenzenesulphonyloxy]pyridine (Compound No. 24).

¹ H NMR (CDCl₃): 1.04 (6H,d); 3.48 (1H,m); 3.90 (3H,s); 4.5 (1H,bd); 7.05 (2H,m); 7.25 (1H,d); 7.89 (1H,d); 8.00 (3H,m).

EXAMPLE 25

2-[N-(Prop-2-yl)sulphamoyl]-6-[2-thiophenesulphonyloxy]pyridine (Compound No. 25).

¹ H NMR (CDCl₃): 1.10 (6H,d); 3.53 (1H,m); 4.70 (1H,bd); 7.19 (1H,m); 7.28 (1H,d); 7.80 (1H,dd); 7.98 (3H,m).

EXAMPLE 26

2-[N-(Prop-2-yl)sulphamoyl]-6-(chloromethanesulphonyloxy)pyridine (Compound No. 26).

¹ H NMR (CDCl₃): 1.12 (6H,d); 3.60 (1H,m); 4.8 (1H,bd); 5.22 (2H,s); 7.35 (1H,d); 8.02 (1H,d); 8.10 (1H,t).

EXAMPLE 27

2-[N-(Prop-2-yl)sulphamoyl]-6-(3-chloropropanesulphonyloxy)pyridine (Compound No. 27).

¹ H NMR (CDCl₃): 1.14 (6H,d); 2.51 (2H,m); 3.60 (1H,m); 3.80 (2H,t); 3.90 (2H,t); 4.75 (1H,bd); 7.31 (1H,bd); 8.01 (1H,bd); 8.05 (1H,t).

EXAMPLE 28

2-[N-(Prop-2-yl)sulphamoyl]-6-[6-fluoro-2-pyridinesulphonyloxy]pyridine (Compound No. 28).

¹ H NMR (CDCl₃): 1.02 (6H,d); 3.4 (1H,m); 7.15 (1H,d); 7.4 (2H,m); 7.9 (1H,d); 8.10 (1H,t); 8.20 (2H,m).

EXAMPLE 29

2-[N-(prop-2-yl)sulphamoyl]-6-[2-phenylethylenesulphonyloxy]pyridine (Compound No. 29).

¹ H NMR (CDCl₃): 1.05 (6H,d); 3.56 (1H,m); 4.55 (1H,bd); 7.25-7.35 (2H,m); 7.36 (3H,m); 7.60 (2H,m); 7.80 (1H,d); 7.91 (1H,bd); 8.03 (1H,t).

EXAMPLE 30

2-[N-(Prop-2-yl)sulphamoyl]-6-(dichloromethanesulphonyloxy)pyridine (Compound No. 30).

¹ H NMR (CDCl₃): 1.15 (6H,d); 3.58 (1H,m); 5.37 (1H,bd); 7.34 (1H,s); 7.36 (1H,d); 8.05 (1H,bd); 8.12 (1H,t).

EXAMPLE 31

2-[N-cyclopropylsulphamoyl]-6-(ethanesulphonyloxy)pyridine (Compound No. 31).

15 ¹ H NMR (CDCl₃): 0.7 (4H,m); 1.6 (3H,t); 2.45 (1H,m); 3.7 (2H,q); 5.15 (1H,bs); 7.35 (2H,bd); 8.05 (2H,m).

EXAMPLE 32 2-[Sulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No. 32).

¹ H NMR (DMSO): 3.68 (3H,s); 7.5 (1H,d); 7.68 (2H,bs); 7.9 (1H,d); 8.2 (1H,dd).

EXAMPLE 33

2-[N-prop-2-yl]-6-(ethylenesulphonyloxy)pyridine (Compound No. 33).

Alternative process: To a stirred solution of 2-[N-prop-2-yl]pyrid-6-one (0.5g) and 2-chloroethanesulphonyl chloride (0.385g) in dichloromethane (10 cm³) at 0° C. was added a solution of triethylamine (0.33 g) in dichloromethane (5 cm³). The reaction mixture was poured onto water and the product extracted into dichloromethane. The combined organic layers were dried over magnesium sulphate, filtered and the solvent removed by evaporation under reduced pressure. The resulting crude product was purified by silica chromatography eluting with hexane containing 20% by volume ethyl acetate.

¹ H NMR (CDCl₃): 1.15 (6H,d); 3.6 (1H,m); 4.8 (1H,d); 6.3 (1H,d); 6.6 (1H,d); 7.2 (1H,dd); 7.3 (1H,d); 7.95 (1H,d); 8.05 (1H,t).

EXAMPLE 34

2-[N,N-di-(prop-2-yl)sulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No. 34).

¹ H NMR (CDCl₃): 1.30 (12H,d); 3.54 (3H,s); 3.90 (2H,m); 7.25 (1H,dd); 8.00 (2H,m);

(iii) 2-[N-di-(prop-2-yl)sulphamoyl]-6-fluoropyridine.

Note: Since the reaction to form this product was slow, the reaction mixture was warmed to room temperature and two equivalents of pyridine were added.

¹ H NMR: (CDCl₃): 1.30 (12H,d); 3.95 (2H,m); 7.08 (1H,dd); 7.88 (1H,dd); 7.95 (1H,dd).

(v) 2-[N,N-di-(prop-2-yl)sulphamoyl]pyrid-6-one

¹ H NMR (CDCl₃): 1.30 (12H,d); 3.80 (2H,m); 6.75 (1H,d); 6.95 (1H,d); 7.55 (1H,dd).

EXAMPLE 35

2-[N-(cyclopropyl)methyl-N-methyl]-6-(methanesulphonyloxy)pyridine (Compound No. 35).

¹ H NMR (CDCl₃): 0.20 (2H,m); 0.55 (2H,m); 0.95 (1H,m); 3.05 (3H,s); 3.13 (2H,d); 3.55 (3H,s); 7.25 (1H,d); 7.90 (1H,d); 8.0 (1H,t).

(iii) 2-[N-(cyclopropyl)methyl-N-methyl]-6-fluoropyridine (A) 2-[N-(cyclopropyl)methyl-N-methyl]-6-fluoropyridine was prepared by the N-methylation of 2-[-N-(cyclopropyl)methyl]-6-fluoropyridine (B) which was prepared according to the method of Example 1 (iii).

¹ H NMR (CDCl₃): (B): 0.20 (2H,m); 0.50 (2H,m); 0.95 (1H,m); 3.05 (2H,t); 4.90 (1H,bt); 7.18 (1H,dd); 7.90 (1H,dd); 8.05 (1H,dd).

Compound (B) was methylated using dimethyl sulphate under standard conditions to produce compound (A).

¹ H NMR (CDCl₃): 0.20 (2H,m); 0.50 (2H,m); 0.95 (1H,m); 3.00 (3H,s); 3.15 (2H,d); 7.10 (1H,dd); 7.80 (1H,dd); 8.00 (1H,dd).

(iv) 2-[N-(cyclopropyl)methyl-N-methylsulphamoyl]-6-(benzyloxy)pyridine.

¹ H NMR (CDCl₃): 0.20 (2H,m); 0.50 (2H,m); 0.95 (1H,m); 3.00 (1H,s); 3.10 (2H,d); 5.45 (2H,s); 7.0 (1H,d); 7.35 (5H,m); 7.60 (1H,d); 7.80 (1H,dd).

(v) 2-[N-(cyclopropyl)methyl-N-methylsulphamoyl]- pyrid-6-one.

¹ H NMR (CDCl₃): 0.20 (2H,m); 0.55 (2H,m); 0.95 (1H,m); 2.95 (3H,s); 3.05 (2H,d); 6.81 (1H,d); 7.00 (1H,d); 7.60 (1H,t).

EXAMPLE 36

2-[N,N-dipropylsulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No. 36).

¹ H NMR (CDCl₃): 0.90 (6H,t); 1.60 (4H,m); 3.25 (4H,t); 3.55 (3H,s); 7.25 (1H,d); 7.95 (1H,d); 8.05 (1H,t).

(iii) 2-[N,N-dipropylsulphamoyl]-6-fluoropyridine.

¹ H NMR (CDCl₃): 0.90 (6H,t); 1.6 (4H,m); 3.25 (4H,t) 7.15 (1H,dd); 7.85 (1H,dd); 8.05 (1H,dd).

(iv) 2-[N,N-dipropylsulphamoyl]-6-(benzyloxy)pyridine.

¹ H NMR (CDCl₃): 0.85 (6H,t); 1.55 (4H,m); 3.15 (4H,t); 5.40 (2H,s); 6.95 (1H,d); 7.30 (5H,m); 7.55 (1H,d); 7.75 (1H,t).

(v) 2-[N,N-dipropylsulphamoyl]pyrid-6-one.

¹ H NMR (CDCl₃): 0.90 (6H,t); 1.60 (4H,m); 3.20 (4H,t); 6.82 (1H,d); 7.00 (1H,d); 7.60 (1H,dd).

EXAMPLE 37

2-[N,N-diethylsulphamoyll]-6-methanesulphonyloxy)pyridine (Compound No. 37).

¹ H NMR (CDCl₃): 1.2 (6H,t); 3.4 (4H,q); 3.55 (3H,s); 7.25 (1H,d); 7.9 (1H,d); 8.05 (1H,t).

(v) 2-[N,N-diethylsulphamoyl]pyrid-6-one.

¹ H NMR (CDCl₃): 1.15 (6H,t); 3.35 (4H,q); 6.84 (1H,d); 7.04 (1H,d); 7.6 (1H,dd).

EXAMPLE 38

2-[N-methyl-N-propylsulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No. 38).

¹ H NMR (CDCl₃): 0.95 (3H,t); 1.60 (2H,m); 2.95 (3H,s); 3.18 (2H,t); 3.55 (3H,s); 7.28 (1H,d); 7.90 (1H,d); 8.06 (1H,t).

(iii) 2-[N-methyl-N-propylsulphamoyl]-6-fluoropyridine.

¹ H NMR (CDCl₃): 0.95 (3H,t); 1.60 (2H,m); 2.95 (3H,s); 3.25 (2H,t); 7.18 (1H,dd); 7.85 (1H,dd); 8.08 (1H,dd).

(iv) 2-[N-methyl-N-propylsulphamoyl]-6-benzyloxypyridine.

¹ H NMR (CDCl₃): 0.90 (3H,t); 1.55 (2H,m); 2.85 (3H,s); 3.10 (2H,t); 5.40 (2H,s); 6.98 (1H,d); 7.35 (5H,m); 7.55 (1H,d); 7.75 (1H,t).

(v) 2-[N-methyl-N-propylsulphamoyl]pyrid-6-one.

¹ H NMR (CDCl₃): 0.95 (3H,t); 1.60 (2H,m); 2.85 (3H,s); 3.16 (2H,t); 6.88 (1H,d); 7.00 (1H,d); 7.60 (1H,dd).

EXAMPLE 39

2-[N,N-dimethylsulphamoyl]-6-(methansulphonyloxy)pyridine (Compound No. 39).

¹ H NMR (CDCl₃): 2.92 (6H,s); 3.55 (3H,s); 7.27 (1H,d); 7.90 (1H,d); 8.06 (1H,t).

(v) 2-[N,N-dimethylsulphamoyl]pyrid-6-one.

This compound was prepared by bis-methylation of 2-sulphamoylpyrid-6-one using dimethylsulphate under standard conditions.

¹ H NMR (CDCl₃): 2.88 (6H,s); 6.90 (1H,d); 7.03 (1H,d 7.65 (1H,dd).

EXAMPLE 40

2-[N-(2-methylpropyl)sulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No 40).

¹ H NMR (CDCl₃): 0.95 (6H,d); 1.75 (1H,m); 2.92 (2H,t); 3.50 (3H,s); 4.70 (1H,bt); 7.30 (1H,d); 7.95 (1H,d); 8.05 (1H,t).

(iii) 2-[N-(2-methylpropyl)sulphamoyl]-6-fluoropyridine.

¹ H NMR (CDCl₃): 0.95 (6H,d); 1.80 (1H,m); 2.90 (2H,d); 7.15 (1H,dd); 7.90 (1H,dd); 8.05 (1H,dd).

(iv) 2-[N-(2-methylpropyl)sulphamoyl]-6-benzyloxypyridine.

¹ H NMR (CDCl₃): 0.85 (6H,d); 1.65 (1H,m); 2.70 (2H,t); 4.80 (1H,bt); 5.40 (2H,s); 6.98 (1H,d); 7.35 (5H,m); 7.55 (1H,d); 7.75 (1H,t).

(v) 2-[N-(2-methylpropyl)sulphamoyl]pyrid-6-one.

¹ H NMR (CDCl₃): 0.95 (6H,d); 1.80 (1H,m); 2.80 (2H,t); 6.2 (1H,bt); 6.80 (1H,d); 7.08 (1H,d); 7.65 (1H,t).

EXAMPLE 41

2-[N-ethyl-N-methylsulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No. 41).

¹ H NMR (CDCl₃): 1.16 (3H,t); 2.95 (3H,s); 3.30 (2H,q); 3.55 (3H,s); 7.25 (1H,d); 7.90 (1H,d); 8.05 (1H,t).

(iii) 2-[N-ethyl-N-methylsulphamoyl]-6-fluoropyridine.

¹ H NMR (CDCl₃): 1.16 (3H,t); 2.95 (3H,s); 3.38 (2H,q); 7.18 (1H,dd); 7.85 (1H,dd); 8.05 (1H,dd).

(iv) 2-[N-ethyl-N-methylsulphamoyl]-6-(benzyloxy)pyridine.

¹ H NMR (CDCl₃): 1.15 (3H,t), 2.88 (3H,s); 3.35 (2H,q); 5.40 (2H,s); 6.98 (1H,d); 7.40 (5H,m); 7.55 (1H,d); 7.75 (1H,dd).

(v) 2-[N-ethyl-N-methylsulphamoyl]pyrid-6-one.

¹ H NMR (CDCl₃): 1.19 (3H,t); 2.90 (3H,s); 3.28 (2H,q); 6.82 (1H,d); 7.02 (1H,d); 7.60 (1H,dd).

EXAMPLE 42

2-[N-(3,3,3,2,2-pentafluoropropyl)sulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No. 42).

¹ H NMR (CDCl₃): 3.50 (3H,s); 3.92 (2H,bt); 5.20 (1H,bs); 7.31 (1H,d); 7.95 (1H,d); 8.09 (1H,t).

(iii) 2[N-(3,3,3,2,2-pentafluoropropyl)sulphamoyl]-6-fluoropyridine.

¹ H NMR (CDCl₃): 3.90 (2H,dt); 5.30 (1H,bt); 7.20 (1H,dd); 7.90 (1H,dd); 8.06 (1H,dd).

(iv) 2-[N-(3,3,3,2,2-pentafluoropropyl)sulphamoyl]-6(benzyloxy)pyridine.

¹ H NMR (CDCl₃): 3.55 (2H,dt); 5.15 (1H,bt); 5.40 (2H,s); 7.04 (1H,d); 7.35 (5H,m); 7.55 (1H,d); 7.78 (1H,t).

(v) 2-[N-(3,3,3,2,2-pentafluoropropyl)sulphamoyl]-pyrid-6-one.

¹ H NMR (DMSO): 3.90 (2H,bt); 6.82 (1H,d); 7.30 (1H,d) 7.82 (1H,t).

EXAMPLE 43

2-[N-(3-chloroprop-1-yl)-N-methylsulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No. 43).

¹ H NMR (CDCl₃): 2.05 (2H,m); 2.95 (3H,s); 3.40 (2H,t); 3.55 (3H,s); 3.62 (2H,t); 7.28 (1H,d); 7.90 (1H,d); 8.05 (1H,t).

(iii) 2-N-[N-(3-chloroprop-1-yl)-N-methylsulphamoyl]-6-fluoropyridine (A).

Compound (A) was prepared by N-methylation of 2-[N-(3-chloroprop-1-yl)sulphamoyl]-6-fluoropyridine (B) using standard conditions.

(A) ¹ H NMR (CDCl₃): 2.08 (2H,m); 2.98 (3H,s); 3.45 (2H,t); 3.64 (2H,t); 7.18 (1H,dd); 7.88 (1H,dd); 8.05 (1H,dd).

(B) ¹ H NMR (CDCl₃): 2.03 (2H,m); 3.30 (2H,m); 3.62 (2H,t); 5.20 (1H,bs); 7.18 (1H,dd); 7.90 (1H,dd); 8.05 (1H,dd).

(iv) 2-[N-(3-chloroprop-1-yl)n-methylsulphamoyl]-6-(benzyloxy)pyridine.

¹ H NMR (CDCl₃): 2.08 (2H,m); 3.02 (3H,s); 3.38 (2H,t); 3.65 (2H,t); 5.50 (2H,s); 7.08 (1H,d); 7.40 (5H,m); 7.60 (1H,d) 7.85 (1H,t).

(v) 2-[N-(3-chloroprop-1-yl)-N-methylsulphamoyl]-pyrid-6-one.

¹ H NMR (CDCl₃): 2.05 (2H,m); 2.90 (3H,s); 3.35 (2H,t); 3.60 (2H,t); 6.89 (1H,d); 7.15 (1H,d); 7.68 (1H,t).

EXAMPLE 44

2-[N-(1,1,1-trifluoroprop-2-yl)sulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No 44).

¹ H NMR (CDCl₃): 1.30 (3H,d); 3.57 (3H,s); 4.00 (1H,m); 7.30 (1H,d); 7.95 (1H,d); 8.08 (1H,t); 8.60 (1H,bs).

(v) 2-[N-(1,1,1-trifluoroprop-2-yl)sulphamoyl]pyrid-6-one.

¹ H NMR (CDCl₃): 1.38 (3H,d); 4.00 (1H,m); 6.85 (2H,m); 7.09 (1H,d); 7.68 (1H,dd).

EXAMPLE 45

2-[N-(3,3,3-trifluoropropyl)sulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No. 45).

¹ H NMR (CDCl₃): 2.45 (2H,m); 3.45 (2H,q); 3.54 (3H,s); 5.10 (1H,bt); 7.32 (1H,d); 7.95 (1H,d); 8.09 (1H,t).

(iii) 2-[N-(3,3,3-trifluoropropyl)sulphamoyl]-6-fluoropyridine.

¹ H NMR (CDCl₃): 2.48 (2H,m); 3.45 (2H,q); 5.19 (1H,bt); 7.20 (1H,dd); 7.90 (1H,dd); 8.05 (1H,dd).

(v) 2-[N-(3,3,3-trifluoropropyl)sulphamoyl]pyrid-6-one.

A solution of 2-[N-(3,3,3-trifluoropropyl)sulphamoyl-6-(benzyloxy)pyridine (1.9 g) and trifluoroacetic acid (5 cm³) in dichloromethane (5 cm³) was stirred at the ambient temperature for 7 hours. The reaction mixture was partially evaporated under reduced pressure. Toluene (5 cm³) was added and the reaction mixture evaporated to dryness. The crude product was purified using silica chromatography eluting with ethyl acetate containing 50% by volume hexane.

¹ H NMR (CDCl₃): 2.40 (2H,m); 3.28 (2H,q); 6.80 (1H,d); 7.20 (1H,bt); 7.28 (1H,d); 7.66 (1H,dd).

EXAMPLE 46

2-[N-methylsulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No. 46).

¹ H NMR (CDCl₃): 2.82 (3H,d); 3.54 (3H,s); 4.75 (1H,m); 4.85 (1H,m); 7.30 (1H,d); 7.98 (1H,d); 8.06 (1H,t).

(iii) 2-[N-methylsulphamoyl]-6-fluoropyridine.

¹ H NMR (CDCl₃): 2.80 (3H,bs); 4.82 (1H,bs); 7.18 (1H,dd); 7.92 (1H,dd); 8.05 (1H,dd).

(v) 2-[N-methylsulphamoyl]pyrid-6-one.

¹ H NMR (CDCl₃): 2.75 (3H,bs); 6.12 (1H,m); 6.85 (1H,d); 7.12 (1H,d); 7.67 (1H,dd).

EXAMPLE 47

2-[N-methyl-N-(prop-2-yn-1-yl)sulphamoyl]-6-(methanesulphonyloxy)pyridine (Compound No. 47).

¹ H NMR (CDCl₃): 2.09 (1H,t); 3.09 (3H,s); 3.55 (3H,s); 4.12 (2H,d); 7.30 (1H,d); 7.93 (1H,d); 8.05 (1H,t).

(v) 2-[N-methyl-N-(prop-2-yn-1-yl)sulphamoyl]pyrid-6-one

This compound was prepared by the following sequence of reactions:

Stage 1: 2-(N-methylsulphamoyl)pyrid-6-one was silylated with dimethyl-(1,1-dimethylethyl)chlorosilane in the presence of imadazole under standard conditions to give 2-[N-methylsulphamoyl]-6-[dimethyl-(1,1-dimethylethyl)silyloxy]pyridine

¹ H NMR (CDCl₃): 0.37 (6H,s); 1.05 (9H,s); 2.76 (3H,d); 4.56 (1H,m); 6.89 (1H,d); 7.59 (1H,d); 7.78 (1H,t).

Stage 2:

To a solution of 2-[N-methylsulphamoyl]-6-[dimethyl(1,1-dimethyl)silyloxy]pyridine (0.4 g) in tetrahydrofuran (15 cm³) at -78° C. under an atmosphere of nitrogen was added a 2.5M solution of butyl lithium in hexane (0.56 cm³) with stirring. A solution of prop-2-yn-1-yl bromide (0.2 g of an 80% solution in toluene) in tetrahydrofuran (5 cm³) was added dropwise. The reaction mixture was allowed to warm to the ambient temperature and was then stirred for 17 hours. The reaction mixture was poured onto dilute aqueous hydrochloric acid and mixed by shaking. The product was then extracted into ethyl acetate. The combined organic layers were washed with brine, dried over anhydrous magnesium sulphate and the solvent evaporated under reduced pressure to produce a crude product. The product was purified by silica chromatography eluting with hexane containing ethyl acetate at a concentration gradually increased from 20-50% by volume to give 2-[N-methyl-N-(prop-2-yn-1-yl)sulphamoyl]pyrid-6-one.

¹ H NMR (CDCl₃): 2.20 (1H,t); 2.96 (3H,s); 4.15 (2H,d); 6.88 (1H,d); 7.12 (1H,d); 7.66 (1H,dd).

EXAMPLE 48

2-[N-(1,1-dimethylethyl)sulphamoyl]-6-(methanesulphamoyloxy)pyridine (Compound No 48).

¹ H NMR (CDCl₃): 1.24 (9H,s); 3.55 (3H,s); 4.90 (1H,bs); 7.28 (1H,d); 8.00 (2H,m).

EXAMPLE 49

4-[N-(prop-2-yl)sulphamoyl]-2-(methanesulphonyloxy)pyridine (Compound No. 49).

¹ H NMR (CDCl₃) 1.15 (6H,d); 3.54 (3H,s); 3.60 (1H,m); 4.60 (1H,bd); 7.50 (1H,s); 7.70 (1H,d); 8.55 (1H,d).

(i) 4-[benzythio]-2-chloropyridine.

¹ H NMR (CDCl₃): 4.23 (2H,s); 7.10(1H,d); 7.20 (1H,bs); 7.44 (5H,m); 8.20 (1H,d).

(ii) 4-[N-(prop-2-yl)sulphamoyl]pyridine-2-sulphonyl chloride.

(iii) 4-[N-(prop-2-yl)sulphamoyl]-2-chloropyridine.

¹ H NMR (CDCl₃): 1.28 (6H,d); 3.58 (1H,m); 5.58 (1H,d); 7.70 (1H,d); 7.80 (1H,bs); 8.65 (1H,d).

(iv) 4-[N-(prop-2-yl)sulphamoyl]-2-(benzyloxy)pyridine.

¹ H NMR (CDCl₃): 1.25 (6H,d); 3.65 (1H,m); 5.58 (2H,s); 7.35-7.65 (7H,m); 8.45 (1H,d).

(v) 4-[N-(prop-2-yl)sulphamoyl]pyrid-2-one

¹ H NMR (CDCl₃): 1.25 (6H,d); 3.60 (1H,m); 6.58 (1H,bd); 6.99 (1H,bd); 7.75 (1H,d).

EXAMPLE 50

This example illustrates the stages in the preparation of 1-[N-(prop-2-yl)sulphamoyl]-3-(methanesulphonyloxy)benzene (Compound No. 50).

¹ H NMR (CDCl₃) 1.1 (6H,d); 3.25 (3H,s); 3.50 (1H,m); 4.80 (1H,bd); 7.55 (2H,m); 7.85 (2H,m).

Stage 1: 3-[benzoyloxy]benzenesulphonyl chloride was prepared according to the method described by Kato et al, J. Pesticide Science, 13, 107-115 (1988).

Stage 2: 1-[N-(Prop-2-yl)sulphamoyl]-3-(benzoyloxy)benzene.

This compound was prepared from the product of stage 1 by a process similar to that described in stage (iii) of Example 1.

¹ H NMR (CDCl₃): 1.15 (6H,d); 3.55 (1H,m); 4.34 (1H,m); 7.45 (1H,m); 7.5-7,7 (4H,m); 7.80 (2H,m); 8.20 (2H,m).

Stage 3: 1-[N-(prop-2-yl)sulphamoyl]-3-hydroxybenzene.

A mixture of the product of stage 2 (0.18 g), 2M aqueous sodium hydroxide solution (15 cm³) and tetrahydrofuran (15 cm³) was stirred for 2 hours at the ambient temperature.

The reaction mixture was poured onto water and the organic layer was separated. The aqueous layer was acidified and extracted with ethyl acetate and the organic layers combined and washed with a basic aqueous wash to remove benzoic acid. The organic layers were then dried over anhydrous magnesium sulphate and the solvents evaporated under reduced pressure.

¹ H NMR (CDCl₃): 1.08 (6H,d); 3.45 (1H,m); 5.1 (1H,d); 7.08 (1H,m); 7.3-7.5 (3H,m).

EXAMPLE 51

This Example illustrates the stages in the preparation of 2-[N-(prop-2-yl)sulphenyl]-6-(methanesulphonyloxy)pyridine (Compound No. 51)

Stage 1: 2,6-bis-(methanesulphonyloxy)pyridine. 2,6-dihydroxypyridine hydrochloride (3 g) was suspended in dichloromethane (250 cm³) under an atmosphere of nitrogen at 0° C. The mixture was treated with methanesulphonyl chloride (3.5 cm³). The suspension was stirred and triethylamine (9.4 cm³) was added in aliquots over 15 minutes. The resulting mixture was stirred for 17 hours and poured onto brine. The organic layer was separated, washed twice with brine, dried over anhydrous magnesium sulphate, and the solvent evaporated under reduced pressure.

¹ H NMR (CDCl₃): 3.5 (6H,s); 7.03 (2H,d); 7.95 (1H,dd).

Stage 2: 2-(benzylthio)-6-(methanesulphonyloxy)pyridine.

A solution of sodium benzylthiolate (0.002 moles, 0.292 g) in dimethylformamide (7.5 cm³) was added dropwise to a solution of the product of stage 1 in dimethylformamide (5 cm³) under an atmosphere of nitrogen at 0° C. The resulting solution was stirred at the ambient temperature for 15 minutes. The reaction mixture was poured onto brine, and the product extracted into diethyl ether. The combined organic layers were washed with brine, dried over anhydrous magnesium sulphate, filtered and the solvent evaporated under reduced pressure to leave the crude product.

The product was purified by silica chromatography eluting with hexane containing 33% by volume diethyl ether.

¹ H NMR (CDCl₃): 3.30 (3H,s); 4.39 (2H,s); 6.80 (1H,d); 7.17 (1H,d); 7.30 (5H,m); 7.60 (1H,dd).

Stage 3: 2-[N-(prop-2-yl)sulphenyl]-6-(methanesulphonyloxy)pyridine (Compound No. 51).

The product of stage 2 (0.07 g) was dissolved in

dichloromethane (1 cm³) at room temperature under an atmosphere of nitrogen and a solution of sulphuryl chloride in dichloromethane (1 cm³) added in portions. After 30 minutes the reaction mixture was added to a solution of 2-aminopropane (0.4 cm³) in dichloromethane (10 cm³) with stirring. The mixture was allowed to stand for 17 hours, and was then washed with brine and dried over anhydrous magnesium sulphate. The solvent was evaporated under reduced pressure and the crude product purified by silica chromatography, eluting with hexane containing 33% by volume diethyl ether, to give the title product.

¹ H NMR (CDCl₃): 1.20 (6H,d); 3.00 (1H,m); 3.18 (1H,m); 3.48 (3H,s); 6.78 (1H,d); 7.40 (1H,d); 7.69 (1H,dd).

EXAMPLE 52

This Example illustrates the preparation of 2-[N-(prop-2-yl)sulphinyl]-6(methanesulphonyloxy)pyridine (Compound No. 52).

A solution of 2-[N-(prop-2-yl)sulphenyl]-6-(methanesulphonyloxy)pyridine (0.055 g) in dichloromethane (2 cm³) was cooled to -78° C. and a solution of m-chloroperbenzoic acid (0.04 g) in dichloromethane (2 cm³) was added. After 1 hour, the reaction mixture was poured into an aqueous solution of sodium bicarbonate. The organic layer was separated, washed with aqueous sodium bicarbonate solution and brine and then dried over anhydrous magnesium sulphate. Evaporation of the solvent under reduced pressure gave a crude product which was purified by silica chromatography, eluting with hexane containing 50% by volume ethyl acetate.

¹ H NMR (CDCl₃): 1.12 (3H,d); 1.30 (3H,d); 3.55 (3H,s); 3.58 (1H,m); 4.18 (1H,bd); 7.24 (1H,m); 8.02 (2H,m).

EXAMPLE 53

This Example illustrates an emulsifiable concentrate composition which is readily convertible by dilution with water into a liquid preparation suitable for spraying purposes. The concentrate has the following composition:

    ______________________________________                                                                  % Weight                                              ______________________________________                                         Compound No 1              25.0                                                SYNPERONIC NP13 (nonylphenol-ethyleneoxide                                                                2.5                                                 condensate; Synperonic is a registered                                         trade mark)                                                                    Calcium dodecylbenzenesulphonate                                                                          2.5                                                 AROMASOL H (alkylbenzene solvent;                                                                         70                                                  Aromasol is a registered trade mark)                                           ______________________________________                                    

EXAMPLE 54

This Example illustrates an emulsifiable concentrate composition which is readily convertible by dilution with water into a liquid preparation suitable for spraying purposes. The concentrate has the following composition:

    ______________________________________                                                                  % Weight                                              ______________________________________                                         Compound No 3              50.0                                                SYNPERONIC NP13 (nonylphenol-ethyleneoxide                                                                6.0                                                 condensate; Synperonic is a registered                                         trade mark)                                                                    Calcium dodecylbenzenesulphonate                                                                          4.0                                                 AROMASOL H (alkylbenzene solvent;                                                                         40.0                                                Aromasol is a registered trade mark)                                           ______________________________________                                    

EXAMPLE 55

This Example illustrates an emulsifiable concentrate composition which is readily convertible by dilution with water into a liquid preparation suitable for spraying purposes. The concentrate has the following composition:

    ______________________________________                                                                  % Weight                                              ______________________________________                                         Compound No 5              1.0                                                 SYNPERONIC OP10 (octylphenol-ethyleneoxide                                                                3.0                                                 condensate; Synperonic is a registered                                         trade mark)                                                                    Calcium dodecylbenzenesulphonate                                                                          2.0                                                 AROMASOL H (alkylbenzene solvent;                                                                         94.0                                                Aromasol is a registered trade mark)                                           ______________________________________                                    

EXAMPLE 56

This Example illustrates a wettable powder composition which is readily convertible by dilution with water into a liquid preparation suitable for spraying purposes. The wettable powder has the following composition:

    ______________________________________                                                         % Weight                                                       ______________________________________                                         Compound No 46    25.0                                                         Silica            25.0                                                         Sodium lignosulphonate                                                                           5.0                                                          Sodium lauryl sulphate                                                                           2.0                                                          Kaolinite         43.0                                                         ______________________________________                                    

EXAMPLE 57

This Example illustrates a wettable powder composition which is readily convertible by dilution with water into a liquid preparation suitable for spraying purposes. The wettable powder has the following composition:

    ______________________________________                                                         % Weight                                                       ______________________________________                                         Compound No. 11   1.0                                                          Sodium lignosulphonate                                                                           5.0                                                          Sodium lauryl sulphate                                                                           2.0                                                          Kaolinite         92.0                                                         ______________________________________                                    

EXAMPLE 58

This Example illustrates a wettable powder composition which is readily convertible by dilution with water into a liquid preparation suitable for spraying purposes. The wettable powder has the following composition:

    ______________________________________                                                         % Weight                                                       ______________________________________                                         Compound No 42    40.0                                                         Silica            40.0                                                         Calcium lignosulphonate                                                                          5.0                                                          Sodium lauryl sulphate                                                                           2.0                                                          Kaolinite         13.0                                                         ______________________________________                                    

EXAMPLE 59

This Example illustrates a dusting powder which may be applied directly to plants or other surfaces and comprises 1% by weight of Compound 48 and 99% by weight of talc.

EXAMPLE 60

This Example illustrates a concentrated liquid formulation suitable for application by ultra low volume techniques after mixing with paraffinic diluents.

    ______________________________________                                                               % Weight                                                 ______________________________________                                         Compound No 45          90.0                                                   SOLVESSO 200 (inert diluent; Solvesso                                                                  10.0                                                   is a registered trade mark)                                                    ______________________________________                                    

EXAMPLE 61

This Example illustrates a concentrated liquid formulation suitable for application by ultra low volume techniques after mixing with paraffinic diluents.

    ______________________________________                                                               % Weight                                                 ______________________________________                                         Compound No 44          25.0                                                   SOLVESSO 200 (inert diluent; Solvesso                                                                  75.0                                                   is a registered trade mark)                                                    ______________________________________                                    

EXAMPLE 62

This Example illustrates a concentrated liquid formulation suitable for application by ultra low volume techniques after mixing with paraffinic diluents.

    ______________________________________                                                               % Weight                                                 ______________________________________                                         Compound No 40          10.0                                                   SOLVESSO 200 (inert diluent; Solvesso                                                                  90.0                                                   is a registered trade mark)                                                    ______________________________________                                    

EXAMPLE 63

This Example illustrates a capsule suspension concentrate which is readily convertible by dilution with water to form a preparation suitable for application as an aqueous spray.

    ______________________________________                                                                 % Weight                                               ______________________________________                                         Compound No 1             10.0                                                 Alkylbenzene solvent (e.g. AROMASOL H)                                                                   5.0                                                  Toluene di-isocyanate     3.0                                                  Ethylenediamine           2.0                                                  Polyvinyl alcohol         2.0                                                  Bentonite                 1.5                                                  Polysaccharide (e.g. KELTROL; Keltrol is                                                                 0.1                                                  a registered trade mark)                                                       Water                     76.4                                                 ______________________________________                                    

EXAMPLE 64

This Example illustrates a capsule suspension concentrate which is readily convertible by dilution with water to form a preparation suitable for application as an aqueous spray.

    ______________________________________                                                                 % Weight                                               ______________________________________                                         Compound No 5             1.0                                                  Alkylbenzene solvent (e.g. AROMASOL H)                                                                   10.0                                                 Toluene di-isocyanate     3.0                                                  Ethylenediamine           2.0                                                  Polyvinyl alcohol         2.0                                                  Bentonite                 1.5                                                  Polysaccharide (e.g. KELTROL; Keltrol is                                                                 0.1                                                  a registered trade mark)                                                       Water                     80.4                                                 ______________________________________                                    

EXAMPLE 65

A ready for use granular formulation:

    ______________________________________                                                                 % Weight                                               ______________________________________                                         Compound No 1             0.5                                                  SOLVESSO 200              0.2                                                  nonylphenol ethoxylate (e.g. Synperonic NP8)                                                             0.1                                                  Calcium carbonate granules                                                                               99.2                                                 (0.3-0.7 mm)                                                                   ______________________________________                                    

EXAMPLE 66

An aqueous suspension concentrate:

    ______________________________________                                                                 % Weight                                               ______________________________________                                         Compound No 48            5.0                                                  Kaolinite                 15.0                                                 Sodium lignosulphonate    3.0                                                  nonylphenol ethoxylate (e.g. Synperonic NP 8)                                                            1.5                                                  propylene glycol          10.0                                                 Bentonite                 2.0                                                  Polysaccharide (e.g. Keltrol)                                                                            0.1                                                  Bactericide (e.g. Proxel; Proxel                                               is a registered Trade Mark)                                                    Water                     63.3                                                 ______________________________________                                    

EXAMPLE 67

A ready for use dust (D.P.) made from a concentrate

    ______________________________________                                                                 % Weight                                               ______________________________________                                         Concentrate:                                                                   Compound No 2             10                                                   Silica                    20                                                   Magnesium Carbonate       70                                                   Dust Example containing 1% active ingredient:                                  Above concentrate         10                                                   Talc                      90                                                   ______________________________________                                    

EXAMPLE 68

This Example illustrates a liquid formulation suitable for direct application by ultra low volume techniques.

    ______________________________________                                                              % weight                                                  ______________________________________                                         Compound No 41         15.0                                                    Cotton seed oil        50.0                                                    SOLVESSO 200 (inert diluent;                                                                          35.0                                                    SOLVESSO is a registered trade mark)                                           ______________________________________                                    

EXAMPLE 69

This Example illustrates a ready for use granule formulation.

    ______________________________________                                                                % weight                                                ______________________________________                                         Compound No 1            5.0                                                   SYNPERONIC NP8 (nonylphenol-                                                                            2.0                                                   ethyleneoxide condensate;                                                      SYNPERONIC is a registered trade mark)                                         Pumice granules (20/40 BS Mesh)                                                                         93.0                                                  ______________________________________                                    

EXAMPLE 70

This Example illustrates a water dispersible granule formulation

    ______________________________________                                                           % Weight                                                     ______________________________________                                         Compound No 1       5.0                                                        Sodium lignosulphonate                                                                             5.0                                                        Sodium dioctylsulphosuccinate                                                                      5.0                                                        Sodium acetate      10.0                                                       Montmorillonite powder                                                                             65.0                                                       ______________________________________                                    

EXAMPLE 71

This Example illustrates the insecticidal properties of the products of this invention.

The activity of the product was determined using a variety of insect pests. The product were used in the form of liquid preparations containing 500, 250 or 100 parts per million (ppm) by weight of the product. The preparations were made by dissolving the product in acetone and diluting the solutions to give the required concentration of product using as a diluent water containing 0.01% by weight of a nonylphenol ethoxylate wetting agent sold under the trade name SYNPERONIC NX (registered trade mark).

The test procedure adopted with regard to each pest was essentially the same and comprised supporting a number of the pests on a medium which was usually a host plant or a foodstuff on which the pests feed, and treating either or both of the pests and the medium with the preparations. The mortality of the insects was then assessed at periods varying from 1 to 6 days after the treatment.

The results of the tests are given in Table III for each of the products, at the rate of application indicated (in ppm) in the second column of the Table, as a grading of observed mortality designated as A, B or C, wherein A indicates 80-100% mortality, B indicates 50-79% mortality, and C indicates less than 50% mortality.

In Table III, the test type is designated by a letter code, and the species, support medium, type and duration of the test are given for each code in Table II.

                                      TABLE II                                     __________________________________________________________________________                      SUPPORT                                                       CODE             MEDIUM/                                                                               TYPE OF                                                                              DURATION                                         LETTERS                                                                              TEST SPECIES                                                                              FOOD   TEST  (DAYS)                                           __________________________________________________________________________     MP    Myzus persicae                                                                            French bean                                                                           Contact                                                                              3                                                      (aphids)   leaf                                                          NC    Nephotettix cincticeps                                                                    Rice plant                                                                            Contact                                                                              2                                                (2DAT)                                                                               (green leafhopper-                                                             nymphs)                                                                  (6DAT)                                                                               Nephotettix cincticeps                                                                    "      "     6                                                      (green leafhopper-                                                             nymphs)                                                                  HV    Heliothis virescens                                                                       Cotton leaf                                                                           Residual                                                                             2                                                (2DAT)                                                                               (tobacco budworm-                                                              larvae)                                                                  (6DAT)                                                                               Heliothis virescens                                                                       "      "     6                                                      (tobacco budworm-                                                              larvae)                                                                  SP    Spodoptera exigua                                                                         Cotton leaf                                                                           "     2                                                (2DAT)                                                                               (lesser army worm-                                                             larvae)                                                                  (6DAT)                                                                               Spodoptera exigua                                                                         "      "     6                                                      (lesser army worm-                                                             larvae)                                                                  DB    Diabrotica balteata                                                                       Filter paper/                                                                         Residual                                                                             2                                                      (rootworm-larvae)                                                                         maize seed                                                    __________________________________________________________________________      "Contact" indicates a test in which both the medium and the pests were         treated. "Residual" indicates a test in which the medium was treated prio      to infestation with the pests.                                           

                                      TABLE III                                    __________________________________________________________________________     COMPOUND                                                                               RATE   NC      HV      SP                                              No.     (ppm)                                                                              MP 2DAT                                                                               6DAT                                                                               2DAT                                                                               6DAT                                                                               2DAT                                                                               6DAT                                                                               DB                                      __________________________________________________________________________     1       500 A  A   --  B   B   C   C   B                                       2       500 C  A   --  A   --  C   C   A                                       3       500 C  A   --  C   B   B   B   A                                       4       500 C  B   A   C   C   C   C   C                                       5       500 C  A   --  C   C   C   C   A                                       6       500 C  C   C   C   C   C   C   B                                       7       500 C  C   C   C   A   C   C   C                                       8       500 C  A   --  C   C   C   C   A                                       9       500 C  A   --  C   C   A   --  B                                       10      500 C  C   C   C   C   C   C   C                                       11      100 C  A   --  C   C   --  --  C                                       12      100 C  C   B   C   C   --  --  C                                       13      100 C  B   B   C   C   C   C   C                                       14      500 C  A   --  C   C   C   C   C                                       15      500 C  A   --  C   C   B   B   C                                       16      500 C  C   C   A   --  C   C   B                                       17      500 C  A   --  C   C   C   C   C                                       18      500 C  C   C   C   C   C   C   C                                       19      500 C  C   A   C   C   C   C   C                                       20      500 C  B   A   C   C   C   C   B                                       21      500 C  C   C   C   C   C   C   C                                       22      100 C  C   C   C   C   B   B   C                                       23      100 C  C   C   C   C   B   B   C                                       24      500 C  C   --  C   C   B   A   C                                       25      100 C  B   B   C   C   C   C   C                                       26      500 C  A   --  C   C   C   C   A                                       27      500 C  C   --  C   A   C   C   C                                       28      100 C  B   --  C   C   C   C   C                                       29      500 C  B   --  C   C   C   C   C                                       30      500 C  C   --  C   C   C   C   C                                       31      500 C  B   A   C   C   C   A   A                                       32      500 A  B   B   C   C   C   A   C                                       33      500 C  C   A   C   C   C   C   C                                       34      500 C  A   --  C   C   B   B   B                                       35      500 C  A   --  B   B   C   C   A                                       36      500 C  A   --  C   C   C   C   A                                       37      500 A  A   --  B   A   C   C   A                                       38      500 C  B   A   A   --  C   A   B                                       39      500 B  B   A   C   C   C   C   A                                       40      500 C  A   --  C   C   C   C   C                                       41      500 C  A   --  B   A   C   C   A                                       42      500 C  A   --  B   B   C   C   B                                       43      100 C  A   --  C   B   C   C   A                                       44      500 C  A   --  C   C   C   C   C                                       45      500 C  A   --  C   C   C   C   C                                       46      100 C  C   B   B   A   C   C   B                                       47      500 C  A   --  A   --  A   --  A                                       48      500 C  B   A   C   C   C   C   B                                       49      500 C  A   --  C   C   C   C   C                                       50      100 C  B   B   C   C   A   --  C                                       51      100 C  C   C   C   C   B   B   C                                       52      500 C  A   --  C   B   C   C   A                                       __________________________________________________________________________ 

What is claimed is:
 1. A compound of formula (I): ##STR175## wherein X is nitrogen or carbon bearing a hydrogen atom; R^(a) is a group of formula (R¹) (R²)NS(O)_(n) -- wherein R¹ and R² are independently selected from hydrogen, C₁₋₈ alkyl, C₁₋₆ haloalkyl, C₁₋₆ alkoxy, C₁₋₆ alkoxyalkyl, formyl, C₂₋₆ alkanoyl, C₂₋₈ alkenyl, C₂₋₈ alkynyl, C₃₋₆ cycloalkyl, C₃₋₆ cycloalkylmethyl, phenyl and benzyl, and n is 0, 1 or 2; R^(b) is a group of formula --OSO₂ R³ wherein R³ is selected from C₁₋₈ alkyl, C₁₋₄ alkyl substituted by a phenyl group, C₁₋₈ haloalkyl, C₂₋₆ alkenyl, C₂₋₄ alkenyl substituted by a phenyl group, phenyl optionally substituted by methyl, trifluoromethyl or methoxy, pyridyl optionally substituted by fluorine, thienyl, and a group of formula --N(R⁴)(R⁵) wherein R⁴ and R⁵ are independently selected from hydrogen and C₁₋₄ alkyl; and wherein the groups R^(a) and R^(b) occupy either a 1,3 configuration relative to each other on the ring when X is carbon bearing a hydrogen, or a 2,4 or 2,6 configuration relative to the group X when X is nitrogen.
 2. A compound as claimed in claim 1 wherein each of the groups R¹ and R² is independently selected from hydrogen, C₁₋₇ alkyl, C₁₋₄ haloalkyl, C₁₋₄ alkoxy, C₂₋₄ alkoxyalkyl, formyl, C₂₋₄ alkanoyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, C₃₋₆ cycloalkyl, C₃₋₆ cycloalkylmethyl, phenyl and benzyl.
 3. A compound as claimed in claim 1 or claim 2 wherein the group R³ is C₁₋₄ alkyl, C₁₋₂ alkyl substituted with a phenyl group, C₁₋₆ haloalkyl, C₂₋₄ alkenyl, ethenyl substituted with a phenyl group, phenyl optionally substituted by methyl, trifluoromethyl or methoxy, pyridyl optionally substituted by fluorine, 2-thienyl, 3-thienyl or a group of formula --N(R⁴)(R⁵) wherein R⁴ and R⁵ are independently selected from hydrogen and C₁₋₄ alkyl.
 4. A compound as claimed in claim 1 wherein the value of n is
 2. 5. A compound as claimed in claim 1 wherein the group X is nitrogen.
 6. A compound as claimed in claim 5 wherein the groups R^(a) and R^(b) occupy a 2,6 configuration relative to the group X.
 7. A compound as claimed in claim 1 having the formula (IA): ##STR176## wherein R¹ and R² are independently selected from hydrogen, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₁₋₆ alkoxy, C₁₋₆ alkoxyalkyl, formyl, C₂₋₆ alkanoyl, C₃₋₆ cycloalkyl, phenyl and benzyl; R³ is selected from C₁₋₆ alkyl, C₁₋₆ haloalkyl and a group of formula --N(R⁴)(R⁵) where R⁴ and R⁵ are independently selected from hydrogen and C₁₋₆ alkyl; and n is selected from 0, 1 and
 2. 8. An insecticidal composition comprising an insecticidally effective amount of a compound as claimed in claim 1 in association with an insecticidally inert diluent or carrier.
 9. A method of controlling insect pests at a locus which comprises application to the locus of an insecticidally effective amount of a composition as claimed in claim
 8. 